Question

Решите уравнение
4x²-5(x-1)+9x-4=0

Answer 1

$4 {x}^{2} - 5(x - 1) + 9x - 4 = 0 \ 4 {x}^{2} - 5x + 5 + 9x - 4 = 0 \ 4 {x}^{2} + 4x + 1 = 0 \ {(2x + 1)}^{2} = 0 \ 2x + 1 = 0 \ 2x = - 1 \ x = - 0.5$