write the formula of the (x+y)3
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Answer:
x³+3x²+9x+27
Step-by-step explanation:
as we know that (a+b)³=a³+3ab(a+b) +b³
therefore
(x+3)³=x³+3x(x+3)+(3)³
= x³+3x²+9x+27
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