Question

чему равна сумма x1+x2?​

Answer 1

$\displaystyle\bf\\x^{2} +|a|x+\boxed6=0\\\\x_{1} \cdot x_{2} =\boxed6\\\\x_{1} ^{2} +x_{2} ^{2} =13\\\\(x_{1} +x_{2})^{2} =x_{1} ^{2} +2x_{1} x_{2} +x_{2} ^{2} =13+2\cdot 6=13+12=25\\\\x_{1} +x_{2} =-5$