Question

Resultado dessa conta -x2+10x-25 =O

Answer 1

$-x^2+10x-25=0 \\ \\ a=-1 \\b=10 \\ c=-25 \\ \\ \Delta=b^2-4ac \\ \Delta=10^2-4(-1)(-25) \\ \Delta=100-100 \\ \Delta=0 \\ \\ x= \frac{-b\pm \sqrt{\Delta} }{2a} = \frac{-10\pm0}{-2} \\ \\ x'=x"= \frac{-10}{-2} =5 \\ \\ S=\{5\}$