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If, 2x2 + 4x − 5 = x2 +2x + x2 + 5, then x2 =
Solution
2x2 + 4x − 5 = x2 +2x + x2 + 52x2 + 4x − 5 = 2x2 +2x + 52x = 10x = 5Then, x2 = 52 = 25
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