Question

discriminante da função

f(x)=-x²+9x -14

me ajudeeeem ​

Answer 1

Resposta:

$x'=7\\x"=2$

Explicação passo-a-passo:

$-x^2+9x-14=0\\\Delta=b^2-4*a*c\\\Delta=25\\\sqrt{\Delta}=5 \\\\x=\frac{-b_-^{+}\sqrt{\Delta} }{2*a} =\\\\x'=7\\x"=2$