Question

O cálculo de (x+3)elevado a dois, vezes (2x-5y-1)
Cálculos por favor

Answer 1

$f=(x+3)^2 \times (2x-5y-1)\\\\ f=(x^2+3x+3x+9) \times (2x-5y-1)\\\\ f=(x^2+6x+9) \times (2x-5y+1)\\\\ f=(x^2\times (2x-5y+1)+ 6x \times (2x-5y+1) + 9 \times (2x-5y+1)\\\\ f=(x^3-5x^2y+x^2)+(6x^2-6xy+6x)+(+18x-45y+9)\\\\ f=x^3-5x^2y+x^2+6x^2-6xy+6x+18x-45y+9\\\\f=x^3-5x^2y+7x^2-6xy+24x-45y+9$