Question

Desenvolva a expressão (2x - 3y) elevado a 4.

Answer 1

 (2x - 3y)^4 =

C4,0.(2x)^4.(-3)^0 + C4,1.(2x)^3.(-3)^1 + C4,2.(2x)^2.(-3)^2 + C4,1.(2x)^1.(-3)^3 +  C4,4.(2x)^0.(-3)^4

1.(16x)^4.1 + 4.(8x^3).(-3) + 6.(4x^2).(+9) + 4.(2x).(-27) + 1.1.(-81)

16x^4 - 96x^3 + 216x^2 - 216x - 81