Question

Question 15 of 46

What identity can be used to rewrite the expression 4x² - 9?
A. Difference of Squares
B. Sum of Cubes
C. Difference of Cubes
D. Pythagorean Triples
SUBMIT

Answer 1

A.

Explanation:

4x² is a perfect square because it is (2x)²

9 is a perfect square with a value of 3

so if we factor 4x² - 9 we can use the difference of two squares to get:

(2x+3)(2x-3)