Algebramedium · Past Paper
Factorize a^4 - b^4.
A(a-b)(a+b)(a^2+b^2)
B(a^2-b^2)^2
C(a-b)^2(a+b)^2
D(a-b)(a^3+b^3)
✓ Correct Answer: A — (a-b)(a+b)(a^2+b^2)
(a^2)^2 - (b^2)^2 = (a^2-b^2)(a^2+b^2) = (a-b)(a+b)(a^2+b^2).
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✓ Correct Answer: A — (a-b)(a+b)(a^2+b^2)
(a^2)^2 - (b^2)^2 = (a^2-b^2)(a^2+b^2) = (a-b)(a+b)(a^2+b^2).
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