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Solve the following equation by completing the square.
1. 5x^2 +2 =12 ​(Type an exact​ answer, using radicals as needed. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed. Simplify your​ answer.)

2. 5x^2 - 5x -1 = 0 Compute the discriminant. Then determine the number and type of solutions of the given equation. What is the​ discriminant?

3. x^2-2x-3=0 Solve the absolute value equation or indicate that the equation has no solution. Note: There is either no solution set or a solution set that may use commas to separate answers. |x| = 2

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