8(a-2 b)^{2}-2 a+4 b-1 – InterviewSolution

1.	8(a-2 b)^{2}-2 a+4 b-1
Answer» 8(a-2b)(a-2b)-2(a-2b)-1suppose x=2a-b8xx-2x-1=8xx-4x+2x-1=4x(2x-1)+1(2x-1)=(4x+1)(2x-1)=(8a-4b+1)(2a-4b-1)

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