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This is a special product since:
(a-b)^2=a^2-2ab+b^2 \\ (7q^2m^2-4w^2)^2=49q^4m^4-56q^2m^2w^2+16w^4
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Pwese ko po ba malaman kung pano niyo po nakuha yung final answer niyo??
Kailangan mo lang sundin yung pattern sa (a-b)^2
(7q^2m^2 - 4w^2)^2 = 49q^4m^4+56q^2m^2w^2-16w^4

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