Question

Calcule as raizes da função quadratica f(x)=x2-8x+7

Answer 1

Resposta:

As raizes são 7 e 1

Explicação passo a passo:

$x=\frac{-b+-\sqrt{b^2-4ac} }{2a}\\ a=1\\b=-8\\c=7\\x=\frac{8+-\sqrt{64-28} }{2}\\x=\frac{8+-\sqrt{36} }{2}\\\\x=\frac{8+-6 }{2}\\\\x_1=14/2=7\\x_2=2/2=1$