Question

x=x+10x-8
$x = {x}^{2} + 10x - 8$
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Answer 1

Resposta:

Explicação passo-a-passo:

$x=x^2+10x-8\\x^2+10x-x-8=0\\x^2+9x-8=0\\\\\Delta=b^2-4*a*c\\\Delta=9^2-4*1*(-8)\\\Delta=81+32\\\Delta=113\\\\x=\frac{-b^+_-\sqrt{\Delta}}{2*a}\\\\x=\frac{-9^+_-\sqrt{113}}{2}=\\\\x'=\frac{-9+\sqrt{113}}{2}\\\\x"=\frac{-9-\sqrt{113}}{2}$