Answer:
See below
Explanation:
-8 and -4 have a GCF of -4, thus:
-8u^2-4u^2
-4(2u^2+u^2)
Factor out u^2:
-4u^2(2+1)
-4u^2(3)
-12u^2
Realistically, it's easier to do (-8-4)u^2
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