solve:a(x+y)+b(x-y)=a*2-ab+b*2 a(x+y)-b(x-y)=a*2-ab+b*2 – InterviewSolution

1.	solve:a(x+y)+b(x-y)=a2-ab+b2 a(x+y)-b(x-y)=a2-ab+b2
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