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Find the coefficient of u^2 in expansion of (2u - 1)^5 using binomial theorem.

 Feb 17, 2021
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This website explains it really well --> https://www.mathsisfun.com/algebra/binomial-theorem.html

 

The exponents for u2 is:

(5C3)(2u)2(-1)(5 - 2)

= 10(2u)2(-1)3

= 40u2(-1)

= -40u2, which means -40 is your coefficient and your answer :)

 Feb 17, 2021

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