X Formula Quadratic Equation. And it's a 2a under there, not just a plain 2. For example, in this case, the expression under the square root symbol is negative, so the entire expression is not a real number.
Enter quadratic equation in the form $\color{blue}{ax^2 + bx + c = 0}$.
For the quadratic formula to work, you must have your equation arranged in the form (quadratic) = 0. The quadratic formula can be used to solve any quadratic equation but is best saved for when an equation cannot be factorised. Nature of roots of quadratic equation. There are times when we are stuck solving a quadratic equation of the form a{x^2} + bx + c = 0 in order use the quadratic formula, the quadratic equation that we are solving must be converted into the standard form, otherwise, all.
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