Question

1) найдите произведение многочленов
(2а-1)(а+2)
2) решите уравнение
(2х²+5х-3)-2(х²+х+4)=0

Answer 1

$1) \ (2a - 1)(a + 2) = 2a times a + 2a times 2 - 1 times a - 1 times 2 = {2a}^{2} + 4a - a - 2 = {2a}^{2} + 3 a - 2 \ \ 2) \ 2 {x}^{2} + 5x - 3 - 2( {x}^{2} + x + 4) = 0 \ {2x}^{2} + 5x - 3 - 2 {x}^{2} - 2x - 8 = 0 \ 3x - 11 = 0 \ 3x = 11 \ x = frac{11}{3} = 3 frac{2}{3}$