Question

elimine parenteses e reduza os termos semelhantes:

a) 2x * (x-2) - (4x+1)

b) 5xy * (2x-3y) - 3y-3x * (2y-y)

c) 3a * (a-2ab+3b) - 2b * (a-5ab-2b)

Answer 1

Resposta:

Explicação passo-a-passo:

a) 2x * (x-2) - (4x+1)

2x²-4x-4x-1

2x²-8x-1

-----------------------------

b) 5xy * (2x-3y) - 3y-3x * (2y-y)

10x²y-15xy²-3y-6xy+3xy

10x²y-15xy²-3xy-3y

----------------------------------------------

c) 3a * (a-2ab+3b) - 2b * (a-5ab-2b)

3a²-6a²b+9ab-2ab+10ab²+4b²

3a²-6a²b+7ab+10ab²+4b²