Sunday
March 26, 2017

Post a New Question

Posted by on .

Find the coefficient of x³ in the expansion of (2x+5)^6

  • math - ,

    From your last question:
    a^6 + 6 a^5 b + 15 a^4 b^2 + 20 a^3 b^3 + 15 a^2 b^4 + 6 a b^5 + b^6

    Here a = 2x
    and
    b = 5

    so if you are looking for the x^3 term, it is found in the middle
    or
    20 a^3 b^3
    or
    20 * (2x)^3 * 5^3
    = 20 * 8 * 125 x^3
    =20,000 x^3

Answer This Question

First Name:
School Subject:
Answer:

Related Questions

More Related Questions

Post a New Question