Answer
(w-10z)(w-4z)
Work Step by Step
$w^{2}$ - 10 wz - 4 wz + $40z^{2}$
Find the GCD of the first two and the GDC of the last two terms.
w(w -10z) -4z(w -10z)
We take (w -10z) and factor it out which gives us.
(w-10z)(w-4z)
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