What is (2a + b) 3rd power

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asked Feb 21, 2023 144k views

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What is (2a + b) 3rd power

Mathematics
college

Jonathan Benn asked

by Jonathan Benn

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$\begin{gathered} (2a+b)^3=(2a+b)(2a+b)^2 \\ =(2a+b)(4a^2+4ab+b^2) \\ =2a(4a^2+4ab+b^2)+b(4a^2+4ab+b^2) \\ =8a^3+8a^2b+2ab^2+4a^2b+4ab^2+b^3 \\ =8a^3+12a^2b+6ab^2+b^3 \end{gathered}$

Grnbeagle answered Feb 26, 2023

by Grnbeagle

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