Question

Calcule os polinômios abaixo:​

Answer 1

Resposta:

$a) \: \: ( {3x}^{3} + 2x + 1) + ( - {2x}^{3} + x - 4) \\ {3x}^{3} + 2x + 1 - 2 {x}^{3} + x - 4 \\ {x}^{3} + 3x - 3$

$b) \: ( {x}^{2} + 12x - 9) - ( - 8 {x}^{2} + 7x - 1) \\ {x}^{2} + 12x - 9 + 8 {x}^{2} - 7x + 1 \\ 9 {x}^{2} + 5x - 8$

$c) \: \: (x {}^{2} + 3x - 2) \times (x + 2) \\ {x}^{3} + 2 {x}^{2} + 3 {x}^{2} + 6x - 2x - 4 \\ {x}^{3} + 5 {x}^{2} + 4x - 4$

$d) \: \: (12ab + 15 {a}^{2}b + 9 {ab}^{2}) \div (3ab) \\ 4 + 5a + 3b$