Question

Simplifique:

(2x3)^2-x(x-4)

(Y-3)(y+2)-(y+3)^2

Answer 1

1- (2x3)² -> aqui é 2 vezes 3?? se for, ficara assim:

(2x3)²-x(x-4) -> (6)²-x²-4x -> 36-x²-4x
-> -x²-4x+36 (x-1)

x²+4x-36

2- (y-3)(y+2)-(y+3)²

y²+2y-3y-6-(y+3)(y+3)

y²+2y-3y-6-y²+3y+3y+9

y²-y²+2y-3y+3y+3y-6+9

5y+3