Question

Check all polynomials that are perfect square trinomials: (1 points)
49x2 - 8x + 16
4a2 - 20a + 25
25b2 - 5b + 10
16x2 - 8x + 1
help!!

Answer 1

you can rewrite the second one as:

(5-2a)^2

and the last one as:

(1 - 4x)^2

Answer 2

thanks but I was hoping you ould have shown me how it was done. I'm not the person to just receive answers like that

Answer 3

with these, it's all about factoring and playing around until you when you foil, you get the right results. good luck!

Answer 4

can u tell me how you got the last term I got the second but not the last

Answer 5

(1 - 4x)(1-4x)

we need a positive 16x^2, so if we multiply two -4x's together we get 16x^2

we need a -8x, so when we foil we notice that we get:

1 -4x -4x

-4x - 4x = -8

and we need a plus 1, and as you saw, we got that when we foiled. foiling the last two terms gives us 16x^2 as I said before

Answer 6

-8x, not -8

Answer 7

ohh ok haha thanks!^.^

Answer 8

yw