Question

Решить уравнение
|- x^2 + 2x - 3| = 1.

Answer 1

$mid{-x^{2}+2x-3}mid=1 \ x textgreater 0 \ -x^{2}+2x-3=1 \ x^{2}-2x+4=0 \ x_{1,2}=frac{-2pmsqrt{-12}}{2} \ x textless 0 \ -x^{2}+2x-3=-1 \ x^{2}-2x+2=0 \ x_{1,2}=frac{-2pmsqrt{-4}}{2}$