![]() Therefore, x = − 1 More Solved Examples For You The below image illustrates the best use of a quadratic equation.ĭiscriminant = b 2 − 4ac = 22 − 4×1×1 = 0 ![]() The quantity in the square root is called the discriminant or D. Just plug in the values of a, b and c, and do the calculations. We define it as follows: If ax 2 + bx + c = 0 is a quadratic equation, then the value of x is given by the following formula: This is the general quadratic equation formula. A method that will work for every quadratic equation. For such equations, a more powerful method is required. There are equations that can’t be reduced using the above two methods. This is known as the method of completing the squares.
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