Question

determine os produtos apresentados na forma reduzida
1) y.(5y-7)

2) -ab.(a²-3ab+3b²)

3) (x+12).(-5-y)

4) (x+2).(x²-12x+36)​

Answer 1

Explicação passo-a-passo:

1)y.(5y-7)

5y²-7y

2)-ab.(a²-3ab+3b²)

-a³b+3a²b²-3ab³

3)(x+12).(-5-y)

-5x-xy-60-12y

4)(x+2).(x²-12x+36)

x³-12x²+36x+2x²-24x+72

x³-10x+12x+72

Answer 2

Resposta:

$1)\\ \\y.(5y-7)\\ \\5y^{2}-7y\\  \\2)\\ \\-ab.(a^{2}-3ab+3b^{2})\\ \\-a^{3}b+3a^{2}b^{2}-3ab^{3}\\ \\3)\\\\(x+12).(-5-y)\\ \\-5x-xy-60-12y\\ \\4)\\ \\(x+2).(x^{2}-12x+36)\\ \\x^{3}-12x^{2}+36x+2x^{2}-24x+72\\ \\x^{3}-12x^{2}+2x^{2}+36x-24x+72\\ \\x^{3}-10x^{2}+12x+72$