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Solving Quadratic Equations Equations such as x2 = 64, x2 -5x = 0, and x2 + 4x = 5 are called quadratic equations. This is because in each of these equations the greatest exponent of any variable is 2. Standard Form of Quadratic Equations: ax2 + bx + c = 0 Before you select the method that you will use to solve a quadratic, you must use inverse operations to get the equation to equal zero (if necessary). When solving quadratic equations, we can use two methods: 1) Factoring 2) Quadratic Formula Solving Quadratic Equations Using F