e. None of these
Work Step by Step
$(a+b)^2(a-b)^2$ $=(a^2+2ab+b^2)(a^2-2ab+b^2)$ $=a^2(a^2-2ab+b^2)+2ab(a^2-2ab+b^2)+b^2(a^2-2ab+b^2)$ $=a^4-2a^3b+a^2b^2+2a^3b-4a^2b^2+2ab^3+a^2b^2-2ab^3+b^4$ $=a^4-2a^2b^2+b^4$ e. None of these
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