The step that completes the calculation of the quadratic formula is BDAC. See the attached image for the full question.
A quadratic formula is a formula that enables one to resolve an equation or problem that has the form of a quadratic equation.
A quadratic formula is given as:
[tex]$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$[/tex]
It is to be noted that an example of a quadratic equation is given as follows:
F(x) = ax² + bx + c
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