Question

Which is a solution to (x − 2)(x + 10) = 13?

Answer 1

You'll need to expand (x − 2)(x + 10) first,

(x − 2)(x + 10) = 13
$x^2+8 x-20=13$
$x^2+8 x+16=49$
$(x+4)^2=49$
$x+4= \pm 7$
$x=3 , x=-11$