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(5b+1)(3b-2)
You know that 15 only has four factors: 1,3,5, and 15. So the first numbers in the parenthesis are either going to be 1 and 15, or 3 and 5. I would try 3 and 5 first because they are closer together, and the other coefficients in the problem are not super large. So I had (5b )(3b ). Then, I looked at -2. There are two ways to get that: -2 x 1 or -1 x 2. Put one set into the parenthesis, foil it out and see if its right. If not, try the other. That's it!
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What is the factor of 21ab 14b?
You can take 7b out of both of those, leaving 3a and 2
What is the greatest common factor in 21ab and 14b?
The GCF is 7b
What is the greatest common factor of 21ab and14b?
The GCF is 7b.
What is the greatest common factor of 7B -7?
The GCF is 7.
What is the greatest common factor of 28a and 49ab?
7a 7a * 4 = 28a 7a * 7b = 49ab
What is the factor of 21ab 14b?
You can take 7b out of both of those, leaving 3a and 2
What is a2 - 2ab - 15b2 factored completely?
a^(2)- 2ab - 15b^(2) When the first term has a coefficient of '1' (a^(2)), then look at the third term. It is '15'. So we need two numbers that multiply to '15' and 'add/subtract'to '2'. They are 3. & 5. So writing up our brackets ( a 5b)(a 3b) Which signs??? We note from the quadraic , that '15' is negative(-) . So the brackets need one positive(+) and one negative(-) Since the middle term is also negative(-) , then the larger numerical number takes the negative. Hence ( a - 5b)(a + 3b) Done!!!!
How do you factor -5b2 plus 7b-2?
It is: (-5b+2)(b-1) with the help of the quadratic equation formula
What is the greatest common factor in 21ab and 14b?
The GCF is 7b
How do you factor b2 - 7b plus 12?
b^2 - 7b + 12 = b^2 - 4b - 3b + 12 = b(b -4) -3(b - 4) = (b - 3)(b - 4)
What is the Greatest common factor of 21ab 14b?
7b
Factor the expression 100A2 - 49B2?
100a2 - 49b2 is the difference of two perfect squares. Therefore, it is equal to the sum times the difference of the roots: (10a + 7b)(10a - 7b)
What is the answer to 3 times 7b minus 2?
The question is worded amibiguously. Do you mean 3(7b)-2, or 3(7b-2)? 3(7b) - 2: 2 = 21b 2/21 = b 3(7b -2): 21b - 6 = 0. 21b = 6 b = 6/21 = 2/7.
What is the greatest common factor of 21ab and14b?
The GCF is 7b.
What is the greatest common factor of 7B -7?
The GCF is 7.
Factor completely a2 ab 42b2?
(a - 7b)(a + 6b)
Does 7b minus 2 equal 5b?
No. 7b - 2b = 5b
