The coefficient of x in the expansion of (x+3 | vedclass

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Question

Using $(a+b)^{3}=a^{3}+b^{3}+3 a b(a+b),$ we get

$(x+3)^{3}=x^{3}+3^{3}+3 	imes x 	imes 3(x+3)$

$=x^{3}+27+9 x^{2} 	imes 27 x$

Therefore,

Vedclass · Accepted Answer

$27$

Vedclass · Answer

Using $(a+b)^{3}=a^{3}+b^{3}+3 a b(a+b),$ we get

$(x+3)^{3}=x^{3}+3^{3}+3 	imes x 	imes 3(x+3)$

$=x^{3}+27+9 x^{2} 	imes 27 x$

Therefore, the coefficient of $x$ is $27 .$

Hence, $(c)$ is the correct answer.

The coefficient of $x$ in the expansion of $(x+3)^{3}$ is

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