expand the following by using suitable formula (3x-y)³
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Answer:
27x³-27x²y+3xy²-y³
Step-by-step explanation:
Using formula- (a-b)³= (a-b)(a²-2ab+b²
(3x-y)³ = (3x-y)((3x)²-2(3x)(y)+(y²)
= (3x-y)(9x²-6xy+y²)
Multiplying both we get
=27x³-18x²y-3xy²-9x²y+6xy²-y³
=27x³-27x²y+3xy²-y³
Hope it helps you
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