Question

(See attatchment below)

Answer 1

the answer would be 12 I think.

Explanation:

X^2+6x=7X^2

Answer 2

Complete the square

x^2 + 6x + (6/2)^2 =

x^2 + 6x + 3^2 =

x^2 + 6x + 9

So the answer is 9