Question

Реши уравнение x^2 + 2x − 3 = 0.

Answer 1

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