Question

-x²+9x+7=0 resolver em forma de bhaskara​

Answer 1

Bhaskara:

$\large\boxed{\boxed{\boxed{{x_{1,2}=\frac{-b\pm\sqrt{b^2-4*a*c}}{2*a}}}}}}$

$x_{1,2}=\frac{-9\pm\sqrt{9^2-4*(-1)*7}}{2*(-1)}$

$x_{1,2}=\frac{-9\pm\sqrt{81+28}}{-2}$

$x_{1,2}=\frac{-9\pm\sqrt{109}}{-2}$

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