Question

Gwen was asked to solve 3x2−20=7 by factoring using the difference of squares pattern. What is/are the correct solution(s)?(1 point)Responsesx=−3x equals negative 3x=−3, x=3x equals negative 3 , x equals 3x=3x equals 3x=9, x=−9

Answer 1

3x^2 − 20 = 7
=> 3x^2 − 27 = 0
=> 3(x^2 − 9) = 0
=> x^2 − 9 = 0 = (x − 3)(x + 3)
So x = 3 or x = −3.