Algebramedium · Past Paper
Expand: (2a - 3b)^3.
A8a^3 - 27b^3 - 36a^2b + 54ab^2
B8a^3 + 27b^3
C8a^3 - 27b^3
D8a^3 - 36a^2b + 54ab^2 + 27b^3
✓ Correct Answer: A — 8a^3 - 27b^3 - 36a^2b + 54ab^2
Using (x-y)^3 = x^3 - 3x^2y + 3xy^2 - y^3.
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