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Simplifying (x2 + -1)(0) = 0 Reorder the terms: (-1 + x2)(0) = 0 Reorder the terms for easier multiplication: 0(-1 + x2) = 0 Anything times zero is zero. 0(-1 + x2) = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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