Question

Given the following perfect square trinomial, fill in the missing term. (Do not type the variable in the blank.) 4x2 + ___x + 49 Numerical Answers Expected!

Answer 1

4x^2 + ___x + 49

(2x)^2 + ___x + 7^2

it's now in the form

a^2 + 2ab + b^2

Answer 2

where a = 2x and b = 7

So

2ab = 2*(2x)*7

2ab = 28x

Answer 3

Which means that

4x^2 + ___x + 49

turns into

4x^2 + 28x + 49

and it's now a perfect square