4a2 - 20ab2 + 25b4
(2a - 5b2)(2a - 5b2)
(2a - 5b2)2
k(7k + 9)
-2(x + 5)(x - 6)
It is: 2(11x+3) when factorized
It is: 12(2x+3) when factored
It is: x(x+7) when factorized
I could factorize : (3 + x) (17 + 3 x) But have no idea about the next part...
8
It is (x-3)(x-4) when factored
5x + 5y = 5(x+y)
You notice the first two items, 3bx + 3x factorizes into 3x(b+1). And the last two, by +y factorize into y(b+1) . So (b+1) is a common factor, so you can factorize these two into (b+1)(3x+y)
x2+x x(x+1)
Factorize others as you would have them factorize you.