Question 552022
64x^2 - 64x + 16
16(4x^2-4x+1)
16(4x^2-2x-2x+1) Because 4*1=4 and the 2 factors of 4 whose sum is -4 are -2 and -2.
16(2x(2x-1)-1(2x-1))
16(2x-1)(2x-1)
.
Ed