Question

X^2+6X=16 is a quadratic equation what are the solutions?

Answer 1

$x^2+6x=16\\\\ (x+3)^2-9=16\\\\ (x+3)^2=5^2\\\\x+3=5 \ or x+3=-5\\\\ x=2\\\\or x=-8$ 

Answer 2

The answer is 2,-8.
But I am not sure. Hope this will help you!