Найдите корни уравнения. x=-4x+40/x-1
Х - 1 ≠ 0 ; X ≠ 1 --------------------- - 4X + 40 = X * ( X - 1 ) - 4X + 40 = X^2 - X X^2 - X + 4X - 40 = 0 X^2 + 3X - 40 = 0 D = 9 + 160 = 169 ; √ D = 13 X1 = ( - 3 + 13 ) : 2 = 5 X2 = ( - 16 ) : 2 = - 8