Question

Solve 9x2−64=0
by factoring, using the difference of squares pattern. What is/are the correct solution(s)?

(Be sure to use the Check Answer button before moving on!)

Video Player


(1 point)

x=−83, 83



x=83


There is no solution for x because the difference of squares pattern does not apply.

x=83

Skip to navigation

Answer 1

9x^2 − 64 = (3x − 8)(3x + 8) = 0

So 3x − 8 = 0 ⇒ x = 8/3, and 3x + 8 = 0 ⇒ x = −8/3.

Solutions: x = 8/3 and x = −8/3.