Разложите на множители трёхчлен: 1)x^2+4x+3 3) x^2+3x-18
A*(x^2) + b*x + c = a*(x - x1)*(x - x2) 1) x^2 + 4x + 3 = 0 x1 = - 3 x2 = -1 x^2 + 4x + 3 = ( x +3)*(x + 1) 3) x^2 + 3x - 18 = 0 x1 = - 6 x2 = 3 x^2 + 3x - 18 = (x - 3)*(x + 6)