Question

calcule os produtos a seguir:​

Answer 1

Resposta:

$a. \: x \times (2x - 3) \\ 2 {x}^{2} - 3x$

$b. \: (4a + b) \times 2b \\ 8ab + 2 {b}^{2}$

$c. \: (x + 2) \times (x + 2) \\ {x}^{2} + 2x + 2x + 4 \\ {x}^{2} + 4x + 4$

$d. \: (x - 1) \times (y + 2) \\ xy + 2x - y - 2$

$e. \: (a - b) \times (a + b) \\ {a}^{2} + ab - ab - {b}^{2} \\ {a}^{2} - {b}^{2}$

$f. \: 4xy \times ( - x - 3 + y) \\ - 4 {x}^{2} y - 12xy + 4x {y}^{2}$