-7*b %2B 7*a - 4*a*b %2B 5*a^2 - b^2 – InterviewSolution

InterviewSolution

1.	-7b %2B 7a - 4ab %2B 5*a^2 - b^2
Answer» 5a^2-b^2-4ab+7a-7b=5a^2-5ab+ab-b^2+7(a-b)5a(a-b)+b(a-b)+7(a--b)=(a-b)(5a+b+7)

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