Question

Срочно нужно ,ответ правильный !!!!!

Answer 1

$\displaystyle\bf\\1)\\\\x^{2} -3x+2=0\\\\x_{1} +x_{2}=3\\\\x_{1} \cdot x_{2} =2\\\\\\2)\\\\x^{2} +5x+6=0\\\\x_{1} +x_{2}=-5\\\\x_{1} \cdot x_{2} =6\\\\\\3)\\\\x^{2} -x-2=0\\\\x_{1} +x_{2}=1\\\\x_{1} \cdot x_{2} =-2\\\\\\4)\\\\x^{2} +x-2=0\\\\x_{1} +x_{2}=-1\\\\x_{1} \cdot x_{2} =-2$

$\displaystyle\bf\\5)\\\\x^{2} +6x+5=0\\\\x_{1} +x_{2}=-6\\\\x_{1} \cdot x_{2} =5\\\\\\6)\\\\x^{2} -6x+5=0\\\\x_{1} +x_{2}=6\\\\x_{1} \cdot x_{2} =5\\\\\\7)\\\\x^{2} -4x-5=0\\\\x_{1} +x_{2}=4\\\\x_{1} \cdot x_{2} =-5\\\\\\8)\\\\x^{2} -7x+6=0\\\\x_{1} +x_{2}=7\\\\x_{1} \cdot x_{2} =6$