3x2 + 6x is ONE expression. A common factor is a factor that is COMMON to two (or more) expressions - not just one. An alternative answer: 3x can be factored out of both of those.
Those two expressions have no common factor. Therefore, the common denominator is the product of both. Normally you would keep this factored (don't do the actual multiplication, just indicate both factors in the denominator).
This is not factor-able.
That cannot be factored
7x+91 can be factored to: 7(x+13)
Divide all terms by 3:- 2x2+5x-3 = (2x-1)(x+3) when factored
It is: (a+1)(a+3) when factored
Look for a common factor, shared between the two parts. Then divide both parts by this factor, to find the other factor.
It cannot be factored.
That expression can not be factored.
x2 + x + 25 can not be factored.
7(r-12) A 7 is taken out because it is a common factor to both terms.
This expression cannot be factored.
It is: 2(x+4) when factored
It is: 2(x+3y) when factored
The greatest common factor in the two terms is [ 4y ].The factored form of the expression is4y (y + 7x)
(2x+1)(2x+3) when factored
It is (x+3)(x+4) when factored
If you mean: 7x+91 then it can be factored to 7(x+13)
40n2 + 40n = 40n(n + 1) ------------------ That is as factored as far I can see it being factored.
x2 + 5x - 120 can not be factored.
x2 + 150 cannot be factored.
It is 8(80b+81) when factored
It is not possible to give a sensible answer to this question. The greatest common factor (GCF) refers to a factor that is COMMON to two or more numbers or expressions. You have only one expression in the question!
a2+9a+20 = (a+4)(a+5) when factored