Consider the formula for one of the solutions of a quadratic equation: $$x= \frac{-b+\sqrt{b^2-4ac}}{2a}$$ For each of the WeBWorK phrases below enter a T (true) if the phrase describes $x$, correctly, and a F (false) otherwise.
You need to get all answers correct before obtaining credit.
$-b+sqrt(b**2-4*a*c)/2a$

$(-b+sqrt(b**2-4*a*c))/2a$

$\frac{-b+ \sqrt{b^2-4ac}}/{2a}$