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Simplifying 3 + -2x(x + -1) = x(3 + -2x) + -1(x + -3) Reorder the terms: 3 + -2x(-1 + x) = x(3 + -2x) + -1(x + -3) 3 + (-1 * -2x + x * -2x) = x(3 + -2x) + -1(x + -3) 3 + (2x + -2x2) = x(3 + -2x) + -1(x + -3) 3 + 2x + -2x2 = (3 * x + -2x * x) + -1(x + -3) 3 + 2x + -2x2 = (3x + -2x2) + -1(x + -3) Reorder the terms: 3 + 2x + -2x2 = 3x + -2x2 + -1(-3 + x) 3 + 2x + -2x2 = 3x + -2x2 + (-3 * -1 + x * -1) 3 + 2x + -2x2 = 3x + -2x2 + (3 + -1x) Reorder the terms: 3 + 2x + -2x2 = 3 + 3x + -1x + -2x2 Combine like terms: 3x + -1x = 2x 3 + 2x + -2x2 = 3 + 2x + -2x2 Add '-3' to each side of the equation. 3 + 2x + -3 + -2x2 = 3 + 2x + -3 + -2x2 Reorder the terms: 3 + -3 + 2x + -2x2 = 3 + 2x + -3 + -2x2 Combine like terms: 3 + -3 = 0 0 + 2x + -2x2 = 3 + 2x + -3 + -2x2 2x + -2x2 = 3 + 2x + -3 + -2x2 Reorder the terms: 2x + -2x2 = 3 + -3 + 2x + -2x2 Combine like terms: 3 + -3 = 0 2x + -2x2 = 0 + 2x + -2x2 2x + -2x2 = 2x + -2x2 Add '-2x' to each side of the equation. 2x + -2x + -2x2 = 2x + -2x + -2x2 Combine like terms: 2x + -2x = 0 0 + -2x2 = 2x + -2x + -2x2 -2x2 = 2x + -2x + -2x2 Combine like terms: 2x + -2x = 0 -2x2 = 0 + -2x2 -2x2 = -2x2 Add '2x2' to each side of the equation. -2x2 + 2x2 = -2x2 + 2x2 Combine like terms: -2x2 + 2x2 = 0 0 = -2x2 + 2x2 Combine like terms: -2x2 + 2x2 = 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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