The quadratic formula is: x = −b ± √b2 − 4ac 2a x = - b ± b 2 - 4 a c 2 a You can use this formula to solve quadratic equations. Or, if your equation factored, then you can use the quadratic formula to test if your solutions of the quadratic
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Solve by completing the square: Non-integer solutions. Worked example: completing the square (leading coefficient ≠ 1) Solving quadratics by completing the square: no solution. Proof of the
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