As you can see the sum of the roots is indeed − b a and the product of the roots is c a . The example below illustrates how this formula applies to the quadratic equation x 2 - 2x - 8. Again, both formulas - for the sum and the product boil

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You need to know the quadratic formula, and it helps to know the sum and product of roots formulas,and the vertex formula. You need to be able to find irrational and complex solutions

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Steps to Solve Quadratic Equation Using Factorization If we can factorize \ (a {x^2} + bx + c = 0,\,a \ne 0,\) into a product of two linear factors, then the roots of the quadratic

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