Question

решите квадратное уровнение
${x}^{2} + 2x - 3 = 0$
​

Answer 1

Ответ:

l

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