SOLUTION: what is the coefficient of x^7 y in the expansion of (3x-4y)^8

SOLUTION: what is the coefficient of x^7 y in the expansion of (3x-4y)^8

Algebra.Com

Question 1146472: what is the coefficient of x^7 y in the expansion of (3x-4y)^8
Answer by greenestamps(13200) (Show Source): You can put this solution on YOUR website!

From the 8 factors of (3x-4y), you need to choose the "3x" term 7 times and the "-4y" term 1 time:

Use a calculator....
RELATED QUESTIONS
in the binomial expansion of (x+y)^8 what is the coefficient of the term containing x^3... (answered by edjones)

What is the coefficient of {{{x^3y^4}}} in the binomial expansion of {{{(x+y)^7}}}?... (answered by MathTherapy)

What is the coefficient of x^5 in the expansion of... (answered by jim_thompson5910)

What is the coefficient of x^8 in the expansion of (x +... (answered by robertb)

what is the coefficient of x^8 in the expansion of (x^2 +... (answered by stanbon)

What is the coefficient of x^7 in the expansion of (2x+10)^10... (answered by Fombitz)

What is the coefficient of xy in the expansion of... (answered by ewatrrr)

In the expansion of (x + 4y)^12, the numerical coefficient of the 5th term... (answered by MathLover1)

Find the coefficient a of the given term in the expansion of the binomial. Binomial (answered by MathLover1)