14. Expand : (3x-y)³
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Answer:
please mark as brainliest answer
Step-by-step explanation:
(a-b) ^3=a^3-b^3-3ab(a-b)
=a^3-b^3-3a^2b+3ab^2
(3x-y)³
=(3x) ^3-(y) ^3-3(3x) ^2(y) +3(3x) (y) ^2
=9x^3-y^3-27x^2y+9xy^2
hope it helps!
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