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First, add (or subtract) to place the constant on the right side.

Quadratic Equation: Solving by completing the square . Example: Solve 3 x 2 + 12 x + 7 = 0. First, add (or subtract) to place the constant on the right side. 3 x 2 + 12 x = - 7. Next, divide every term on both sides by a number chosen to make "1" the coefficient of the x 2 .

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