b+ca a(iv) b c+a b4abc.LU – InterviewSolution

1.	b+ca a(iv) b c+a b4abc.LU
Answer» L.H.S.=(b+c)(ac+bc+a^2+ab)-a(ab+b^2-bc)+a(bc-ac-c^2) =abc+b^2c+a^2b+ab^2+ac^2+bc^2+a^2c+abc-a^2b-ab^2+abc+abc-a^2c-ac^2=4abc=R.H.S.Hence Proved.

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