Question

Ordene os polinômios segundo as potências decrescentes de x. a) 8x + x2 - 5 c) 4x + x + 2 - 5x2 b) 6 - 3x + 7x d) x2 + x1 - x + x3 - 1​

Answer 1

Resposta:

a) 8x + x2 - 5

${x}^{2} + 8x - 5$

b) 6 - 3x + 7x

$6 + 4x \\ 4x + 6$

c) 4x + x + 2 - 5x2

$5x + 2 - 5 {x}^{2} \\ - 5 {x}^{2} + 5x + 2 \times ( - 1) \\ 5 {x}^{2} - 5x - 2$

d) x2 + x1 - x + x3 - 1

${x}^{2} + x - x + x {}^{3} - 1 \\ {x}^{2} + {x}^{3} - 1 \\ {x}^{3} + {x }^{2} - 1$