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01-11-2017
Mathematics

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choixongdong choixongdong

01-11-2017

5g^4 = 5g^2(g^2)
20g^3 = 5g^2(4g)
-10g^2 = 5g^2(-2)

so
5g^4 + 20g^3 -10g^2 = 5g^2(g^2 + 4g - 2)

answer is A. 5g^2(g^2 + 4g - 2)

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