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Binomial theorem

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What is the coefficient of x^3 in the expansion of (x + 2*sqrt(3))^5?

Jan 21, 2022

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What is the coefficient of x^3 ?

Hello Guest!

$$(x + 2*sqrt(3))^5 =x^5+10 \sqrt{3}x^4+{\color{blue}120x^3}+240\sqrt{3}x^2+720x+288\sqrt{3}$$

The coefficient of x^3 is 120.

!

Jan 21, 2022
edited by asinus  Jan 21, 2022