Question

7
Solve the equation x^2 - 8x + 15 = 0.

Answer 1

x = -5

Evidence to support reasoning:

Answer 2

x=5 x=3

Explanation:

x^2 - 8x + 15 = 0

Factor

What 2 numbers multiply to 15 and add to -8

-5*-3 = 15

-5-3 = -8

(x-5)(x-3) =0

Using the zero product property

x-5 =0 x-3 =0

x=5 x=3