X^2+3x=10 решить уравнение
X^2 + 3x - 10 = 0 D = 9 + 40 = 49 = 7^2 x1 = ( - 3 + 7)/2 = 4/2 = 2 x2 = ( - 3 - 7)/2 = - 10/2 = - 5