Algebrahard · Past Paper
Factorize: a^3 + b^3 + c^3 - 3abc
A(a+b+c)(a^2+b^2+c^2-ab-bc-ca)
B(a+b+c)(a^2+b^2+c^2+ab+bc+ca)
C(a-b-c)(a^2+b^2+c^2-ab-bc-ca)
D(a+b+c)^3
✓ Correct Answer: A — (a+b+c)(a^2+b^2+c^2-ab-bc-ca)
This is a standard algebraic identity for the sum of three cubes.
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