Составьте квадратное уравнение по его корням. -1 ; 3 (). -4 ; 0.
1)-1;3 x^2-x+3=0 2)-4;0 x^2-4x=0
X1 = -1; x2 = 3. c =x1 * x2 = - 1 * 3 = - 3; - b = x1 + x2 = - 1 + 3 = 2; b = - 2 x^2 + b*x + c = 0; x^2 - 2 x - 3 = 0. 2) x1 = - 4; x2 = 0; c = x1 * x2 = - 4 * 0 = 0; - b = x1 + x2 = - 4 + 0 = - 4; b = 4 x^2 + b* x + c = 0; x^2 + 4x = 0