Question

-x ao quadrado + 10x -25=0 usando fórmula de bhaskara​

Answer 1

$-x^2+10x-25=0\\\\\Delta = b^2-4ac\\\Delta=10^2-4\cdot(-1)\cdot(-25)\\\Delta = 100 - 100\\\Delta = 0\\\\x = \dfrac{-b\pm\sqrt\Delta}{2a}\\\\x = \dfrac{-10\pm\sqrt0}{2\cdot(-1)}\\\\x = \dfrac{-10\pm0}{-2}\\\\x = \dfrac{-10}{-2}\\\\x = 5$