Question

Solve each equation by using a graphing calculator.
a) 0 = x2 – 5x – 24

Answer 1

x = -5, x=8

Explanation:

0 = x^2 – 5x – 24

Factor

What 2 numbers multiply to -24 and add to -5

-8*3 = -24

-8+3 = -5

0= (x-8) (x+5)

Using the zero product property

x-8 =0 x+5 =0

x=8 x=-5