How is this expanded by the binomial theorem? (x+2y)^3

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Guest Dec 2, 2014

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Best Answer

$$\\(x+2y)^3\\\\
=^3C_0(2y)^0(x)^3\;+\;^3C_1(2y)^1(x)^2\;+\;^3C_2(2y)^2(x)^1\;+\;^3C_3(2y)^3(x)^0$$

Can you take it from there?

Melody Dec 2, 2014

Melody · Answer 1 · 2014-12-02T10:09:57

$$\\(x+2y)^3\\\\
=^3C_0(2y)^0(x)^3\;+\;^3C_1(2y)^1(x)^2\;+\;^3C_2(2y)^2(x)^1\;+\;^3C_3(2y)^3(x)^0$$

Can you take it from there?