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How To

Do you have a question about how to do something? Looking for a handy guide? This Topic is for people to find "How To" guides to solve their problems, and for people who like to write guides and help others solve their more complex problems.

25,034 Questions

How to factor y2 plus y-2?

y2+y-2 factors to (y+2)(y-1)

The two initial terms of your factoring (y and y) must multiply to equal the first term of your starting problem (y2). Likewise, the last two terms must multiply to equal the last term of your starting problem (-1 * 2 = -2).

You know that one way to reach y2 by multiplying two terms is doing y*y, so your first terms are most likely each y. There are two possible ways of multiplying two terms to equal -2, (2* -1) and (-2 * 1). To decide which version to use, look at the middle term of the starting problem. The coefficient on the middle term must result from adding the two factors that will multiply to equal your third term. That is to say, for this problem, the correct combination of multiplying to equal -2 must add together to equal 1. If we used -2 and 1, these terms add together to equal -1, not 1. If we use the other combination, we get a sum of 1, so this is the correct combination. You simply mate the first terms you determined (y and y) with the second terms you determined (2 and -1).

This leaves: (y+2)(y-1).

Note: If no solution exists for the above method, it is likely a non-factorable trinomial, which will require the use of the quadratic formula.

How to find QR matrix in LQR linear quadratic regulator?

Q = 1 / Maximum value of Z permissible

R = 1/ Maximum value of u permissible

How too write 1317417 in word form?

One million three hundred seventeen thousand four hundred seventeen.

How to convert Square meters to square?

A square can be as small or as large as you like. Therefore the area of a square can be any positive number.

How to find out the pi of a circle?

You cannot find the "PI" of anything Pi is a set numerical value, PI = 3.14159265358979323846… (It goes on forever) But in geometry we consider Pi to equal 3.14

How To Change Decimals To Fractions?

to change a fraction to a decimal you have to have a multiple of 10 like 10, 100, 1000, and so on. you can also have ones like 2, 5, 20, 50, and so on. so lets say we have 4/10 to change it to a decimal, you have to look at the bottom number in this case it is 10 and already a multiple of 10. when you have a decimal, it goes directly to tenths there aren't any types of ones. so a decimal of this problem would be 0.4 same with hundredths except it is one more spot to the right. but if you have a fraction like this, 6/100 you have to put a zero in front of the 6 to put it in the hundredths spot. now lets say i have 3/5 and i want to change it to a decimal. it is the same thing but this time i have to change the 5 to a 10 and to do that you have to multiply top and bottom by 2 so that would be 6/10 which as a decimal would be 0.6

hope that answers your question

How to avoid repeating decimals?

You can't, really. Repeating decimals appear whenever the denominator of a fraction in simplest terms has any prime factor other than 2 or 5.To avoid them, you can do divisions that don't involve those denominators/divisors.

You can also recognize that "infinite precision" is not required for most practical applications, and round the result to an appropriate number of decimals. What is appropriate will depend on the specific application, but 3-4 significant digits is quite often enough.

How to get the LCM of integers?

Example: 30 and 42

Factor them.

2 x 3 x 5 = 30

2 x 3 x 7 = 42

Combine the factors, eliminating duplicates.

2 x 3 x 5 x 7 = 210, the LCM

How to convert 4.4mm to dm?

Since 1 dm = 0.1 m, and 1 mm = 0.001 m, you have to divide the mm by 100.

How to compute in detail sq feet to sq meters?

One square foot is 0.092903 square meters. Therefore, square feet x 0.092903 = square meters

How to Make Flowers Arrangements for Your Home?

Flowers arrangements can be a beautiful addition to any home. You will find that they can brighten up a room and be a great conversation piece. It is important that you are able to pick flowers that are going to compliment your decor as well as work well for you.

Step 1 – Considerations

You will need to first think about if you wish the flowers to be scented or not. Sometimes, strongly scented flowers can give people with sensitive noses headaches. However, you may prefer flowers that have a scent to them as they could mask odors. Leave them near a kitty litter box or a trash can to keep your home smelling fresh.

Step 2 – Time Line

Make sure that you are aware of how long these flowers will be able to last. If you need these flowers to be present for a specific day, then you may want to know how long they will be around. However, some flowers will only fully bloom after a couple of days.

Step 3 – Theme

Think of what you are going to be using these flowers for. If they are for a big occasion, then you may want to consider a more dramatic setting. However, if they are just for an everyday arrangement, then go for a look that is laid back and is not going to be too overwhelming.

Step 4 – Color Wheel

It is important that you are aware of the color choices that you pick. A color wheel is made from primary as well as secondary colors. Each section of color is going to represent an entire category. Tints, for example, would consist of a specific color, along with white. Shades would be a specific color, along with black. If you are going for tones, then you would choose a specific color, in addition to gray. As you hone your craft, you will be able to get a good feel of what works best for you.

Step 5 – Shape

There are several different shapes that you can put your arrangement in. The shape will all come down to your own specific taste and what will look best with your decor.

How to hang a heavy object from two points. I have a heavy 4' wide glass and want to hang it from two clamps along the top edge. Where should the clamps be placed for best weight distribution and why?

You want one clamp on one side of the center of the glass and the other clamp on the other side of the center of the glass witrh both equal distance awy from the center.

That is because then both clamps take the same weight ( 1/2 each). I f they are not centered one wil carry a much higher load and also if both are on the same Sid ethe glass will not be centered.

You should put the clamps near the ends as it will easier to have it level over the greatest distance

How to make twenty five cents A day?

You can go sell lemonade, cookies, juice, or something else. Everyday you can sell something different.

Or you can get a jar and say this is for the people who have cancer and say I am going to send it. Then say $0.75 will be good enough money. But then you should just keep the money.And that's how you get $0.75 a day.

How to find a percent?

finding the percent is not at all difficult first you put the fraction as a decimal then you move the decimal two places to the right.