Question

ME AJUDEM POR FAVOR, EU PRECISO PRA ONTEM

Answer 1

Resposta:

1) a) 2y²-3y-(y²-4y)

2y²-3y-y²+4 = y2+y

b) -(2y²-3y)+(y²-4y)+(4y-2y)

-2y²-3y+y²+4y+4y²-2y

-2y²+y²+4y²+3y-4y-2y = 3y²-3y

2) a) (-(y²-4y)).(2x²+3y)

(-y²+4y).(2x²+3y)

-2x²y²-3y³+8x²y+12y

= -3y³-2x²y²+8x²y+12y

b) (4x-2y²).(-y²+4y)

-4xy²-2y⁴+16xy+8y³

= -2y⁴+8y³-4xy²+16xy