Mathematics

Expanding using binomial theorem

1. (3x - 4)^5 2. (m^2+ 2n)^4-1) (3x - 4)^5 =5C0(3x)^5 + 5C1(3x)^4*(-4) + 5C2(3x)^3*(-4)^2 + 5C3(3x)^2*(-4)^3 + 5C4(3x)(-4)^4 + 5C5(-4)^5 = 243 x^5 - 5*(81)x^4*(4) + 10*(27)x^3*(16) - (10)*9x^2(64)

How to simplify this math problem

i am trying to do this problem but i am getting 4 (5+2)^2 / ( - 5^2 - 3^2)-7^2/-8^2 49/64 Simplify that.-Answer is 49/16 assuming that in the second part the problem is: (-5)^2 - 3^2 = 25-9 = 16--49

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