If two numbers have: a sum of - 7 and their product is - 8, then what are the two numbers?

A) x + y = - 7

B) x * y = - 8

B) y = - 8/x

A) x - 8/x = - 7

A) x² - 8 = - 7x

A) x² + 7x - 8 = 0

Using quadratic formula

x = [-7 + - sq root (49 + 4*1*8) ] / 2*1

x = [-7 + - sq root (81) ] / 2

x1 = (-7 + 9) / 2 = 1

x2 = (-7 - 9) / 2 = - 16/2 = - 8