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Quadratic Formula . The meaning of quadratic formula is a formula that gives the solutions of the general quadratic equation ax2 + bx + c = 0 and that is. It is the general form of a quadratic equation where ‘a’ is called the leading coefficient and ‘c’ is called the absolute term of f (x). Ms. McCullough's Math Class The Quadratic Formula from msmcculloughsmathclass.blogspot.com Back quadratic equations to use the quadratic formula the equations must be in descending order equal to zero (aka standard form). A quadratic equation is an algebraic expression of the second degree in x. Since there are both negative and positive roots of a quadratic equation, the graph takes the shape of a parabola.