Question

Factor completely 64x2 - 1.
A. (8x - 1)(8x - 1)
B. (8x - 1)(8x + 1)
C. (1 - 8x)(1 - 8x)
D. (1 - 8x)(1 + 8x)

Answer 1

64x^2 -1 = (8x -1)(8x+1) using formula a^2 -b^2 = (a-b)(a+b) 

hope helped