0\\x_{1,2}=\frac{-b+-\sqrt{D}} {2a}\\ x_{1}=\frac{-4-2} {2(-1)}= \frac{-6}{-2}=3\\ x_{2}=\frac{-4+2}{2(-1)}= \frac{-2}{-2}=1\\" alt="-x^{2}+4x-3=0\\D=b^{2}-4ac\\D=4^{2}-4(-1)(-3)\\D=16-12\\D=4\\D=2^{2}\\D>0\\x_{1,2}=\frac{-b+-\sqrt{D}} {2a}\\ x_{1}=\frac{-4-2} {2(-1)}= \frac{-6}{-2}=3\\ x_{2}=\frac{-4+2}{2(-1)}= \frac{-2}{-2}=1\\" align="absmiddle" class="latex-formula">
Ответ: 1; 3.