Top Answer

Suppose x3-4x = 0. To solve, factor:

x3-4x = x(x2-4) = x(x+2)(x-2) = 0 Now, a product equals 0 if and only one or more of the factors equals 0, so set each factor to 0 and solve.

The roots are 0,-2 and +2.

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0Algebraically, you're asking to solve for x: 5x - 60 = x4x - 60 = 04x = 60x = 15Let's test just to be sure:15*5 = 7575 - 60 = 15It works, so 15 is the magic number.

Whatever your value of n is, you need to multiply it by 5 and then add 2 to get your answer. Below is how to solve it algebraically: 5n+2 = 0 (it needs to be equal to something in order to solve it, so I assumed that it equals zero) 5n = -2 n = -2/5

2sinx+1 equals 0

For y - 2y - 3y equals 0, y equals 0.

"x equals 0" is an equality, not an inequality. The question is, therefore, not consistent.

x: x2 - 81 = 0

Solve this problem -x squared -40x- 80 =0

10x=x 9x=0 x=0

Divide both sides by 8: m = 0

5 ^x = 0 5 = root square 0 5=0

8x2 + 16x + 8 = 0

2x(3x+6) = 0 x = 0 or x = -2

-y + y equals 0.

Solve using the quadratic formula

a2+30a+56=0 , solve for a Using the quadratic formula, you will find that: a=-2 , a=-28

4x2+50x = 0 4x(x+12.5) = 0 x = 0 or x = -12.5

y=±√15

y - 3 = 0 y = 3

By factoring. q2 + 16q = 0 q (q + 16) = 0 Now, either q = 0, or q + 16 = 0. Solve those two equations to get the solution.

8 x 0 = 4n 0 = 4n 0/4 = n 0 = n

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