Question

find the 5th term in the binomial expansion of
$(x + 3y) {}^{7}$
$(2x - 7) {}^{4}$
​

Answer 1

Step-by-step explanation:

1) x^7-21x^6y+189x^5y^-945x^4y^3+2835x^3y4-5103xy^6-2187y^7

i got only the first one hope it is ok