Question

ajuda a amiga aqui !

Answer 1

Resposta:

$a) \: 2x - 7 {x}^{2} + 4x - 2x + 8x - 3 {x}^{2} \\ - 10 {x}^{2} + 12x$

$b) \: 17a - 2a + 4a - 2a \\ 17a$

$c) \: 9 {x}^{2} + 4 {x}^{2} - 3 {x}^{2} + 3 {x}^{2} \\ 13 {x}^{2}$

$d) \: {x}^{2} - {x}^{2} + 7 {x}^{2} + 10 {x}^{2} + 4 {x}^{2} \\ 21 {x}^{2}$

$e) \: 5x {y}^{2} - 5x {y}^{2} - 8x {y}^{2} + 6x {y}^{2} \\ - 2x {y}^{2}$