X^2-11x-42=0 -2X^2-5x-2=0 ^-степень
1. 2. - 2x^2 - 5x - 2 d = 9 9 = 3 x = (5 + 3) ÷ - 4 = - 2 x = (5 - 3) ÷ - 4= - 0.5