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Which of the following is not a factor of 4x2 - 4x2y - 16x + 16xy?

A. x + 4
B. x - 4
C. 4x
D. 1 - y

Respuesta :

It's A or C you can Chose
answer is A. x + 4 

4x2 - 4x2y - 16x + 16xy
=4x (1 -  y)(x - 4)
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