Algebrahard · Past Paper

Factorize a^4 + a^2b^2 + b^4.

A(a^2+ab+b^2)(a^2-ab+b^2)
B(a^2+b^2)^2
C(a^2-b^2)^2
D(a+b)^4

✓ Correct Answer: A(a^2+ab+b^2)(a^2-ab+b^2)

This is a standard identity obtained by adding and subtracting a^2b^2.

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