Question

monomios e polinomios (precisa de calculo)​

Answer 1

Resposta:

1)

a)

$(3 {x}^{2} - 5x + 2) - ( {x}^{2} + 6x - 4) +( 5x - 7) = \\ 3 {x}^{2} - 5x + 2 - {x}^{2} - 6x + 4 + 5x + 7 = \\ 3 {x}^{2} - {x}^{2} - 5x + 5x - 6x + 2 + 4 + 7 = \\ 2 {x}^{2} + 0 - 6x + 13 = \\ = 2 {x}^{2} - 6x + 13 : resposta$

2)

$( - \frac{1}{2} a - 2b) - ( \frac{3}{5} b + 2a) = \\ \\ - \frac{1}{2} a - 2b - \frac{3}{5} b - 2a = \\ \\ - \frac{1}{2} a - \frac{2a}{1} - \frac{2b}{1} - \frac{3}{5} b = \\ \\ \frac{ - 1 \times a - 2 \times 2a}{2} + \frac{ - 5 \times 2b - 3 \times b}{5} = \\ \\ \frac{ - a - 4a}{2} + \frac{ - 10b - 3b}{5} = \\ \\ = - \frac{5a}{2} - \frac{13b}{5} : resposta$

Bons Estudos!