The required term is 15C13 * (3q)2 * (-s)13
and the coefficient is 15*7*4 = 320.
2 Answers By Expert Tutors
Tony G. answered • 05/12/20
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High School Math Teacher specializing in Algebra and Pre-Calculus
That is the 3nd to last term of the binomial expansion. Using the coefficient of pascal's triangle the answer would be -945q^2s^13
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