Question

Factor: 100x^2- 81

A. (100r-9)(x-9)
B. (10r - 9)^2
C. (10x + 9)^2
D. (10x + 9)( 10x -9)

Answer 1

Choice 'D' (10x + 9) (10x-9) is the correct answer

Explanation:

100x^2 - 81

This is a difference of squares...

therefore = (10x + 9) (10x - 9)