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Simplifying (x2 + -2x + 4) + (2x + 1) + -1(x2 + 5) = 0 Reorder the terms: (4 + -2x + x2) + (2x + 1) + -1(x2 + 5) = 0 Remove parenthesis around (4 + -2x + x2) 4 + -2x + x2 + (2x + 1) + -1(x2 + 5) = 0 Reorder the terms: 4 + -2x + x2 + (1 + 2x) + -1(x2 + 5) = 0 Remove parenthesis around (1 + 2x) 4 + -2x + x2 + 1 + 2x + -1(x2 + 5) = 0 Reorder the terms: 4 + -2x + x2 + 1 + 2x + -1(5 + x2) = 0 4 + -2x + x2 + 1 + 2x + (5 * -1 + x2 * -1) = 0 4 + -2x + x2 + 1 + 2x + (-5 + -1x2) = 0 Reorder the terms: 4 + 1 + -5 + -2x + 2x + x2 + -1x2 = 0 Combine like terms: 4 + 1 = 5 5 + -5 + -2x + 2x + x2 + -1x2 = 0 Combine like terms: 5 + -5 = 0 0 + -2x + 2x + x2 + -1x2 = 0 -2x + 2x + x2 + -1x2 = 0 Combine like terms: -2x + 2x = 0 0 + x2 + -1x2 = 0 x2 + -1x2 = 0 Combine like terms: x2 + -1x2 = 0 0 = 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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