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