Question

Solve. 4x^2 + 8x = 252


x = 7 and x = 9
x = -7 and x = 9
x = -7 and x = -9
x = 7 and x = -9

Answer 1

i think it is easy to divide everything by 4 first
\[x^2+2x=63 => x^2+2x-63=0\]

Answer 2

now we can easily factor this

Answer 3

\[(x+9)(x-7)=0\]
since 9(-7) is -63
and 9+(-7)=2

Answer 4

now set both factors =0 and solve for x