Question

х квадрат - 2х -3=0
Помогите с заданием

Answer 1

${x}^{2} - 2x - 3 = 0 \ \ x1x2 = - 3 \ x1 + x2 = 2 \ \ x1 = 3 \ x2 = - 1$

Answer 2

x² -2x-3 =0

x² + x - 3x - 3 = 0

x(x+1)-3(x+1)=0

(x+1)(x-3)=0

x + 1 =0
x - 3 =0

x = -3
x =3

x1 = -1
x2 =3