Question

What are the solutions to the equation?

x2 + 6x = 40

x = −10 and x = 4
x = −8 and x = 5
x = −5 and x = 8
x = −4 and x = 10

Answer 1

x^2 + 6x = 40 → x^2 + 6x − 40 = 0
Factor: (x + 10)(x − 4) = 0
So x = −10 or x = 4.