Решить уравнение
(5х+3)*(4-2х+0)

(5х+3)(4-2х+0) = 20х-10х²+0+12-6х+0 = -10х²+14х+12Д=196-4*(-10)*12 = 196 + 480 = 676х₁ = (-14-26)/(-20) = -40 / -20 = 2х₂ = (-14+26)/(-20) = 12/ -20 = - 3/5