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Remark: This formula can be used to solveEXAMPLE 8, Solve: x2-4x + 1 = 0. |
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Answer» x²-4x-1 = x²-4x+4-3 = (x-2)²-(√3)² = (x-2-√3)(x-2+√3) So, x = 2 +- √3 |
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