Question

Find the complete factorization of the expression.

−21xyz − 28xy − 35yz
A) 7y(3xz + 4x + 5z)
B) −7y(3xz + 4x + 5z)
C) −7(3xyz + 4xy + 5yz)
D) −y(21xz + 28x + 35z)

Answer 1

The answer would be B

Explanation:

Answer 2

Common factors for the various terms include -1, 7, y. Factoring out the product of those gives ...

... -7y(3xz +4x +5z) . . . . . . matches selection B)