Binomial Expansion: Understanding the Coefficient of x5

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Michael_Light

Homework Statement

Find the coefficient of x⁵ for the expression: (1-x)⁶(2x+3)⁴ The answer provided is -222, but my answer is far from that, can any enlighten me?

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vela

Staff Emeritus

Science Advisor

Homework Helper

You miscalculated the fourth and fifth contributions. The first three are correct.