Question

What are the zeros of f(x) = x2 - 8x+ 15?​

Answer 1

x=5 x=3

Explanation:

f(x) = x^2 - 8x+ 15

Factor

What two numbers multiply to 15 and add to -8

-5*-3 = 15

-5+-3 = -8

f(x) = (x-5) (x-3)

Setting equal to 0

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

Using the zero product property

x-5 =0 x-3=0

x=5 x=3