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Simplifying (3x)(x2 + 6) = 3x3 + 18x Remove parenthesis around (3x) 3x(x2 + 6) = 3x3 + 18x Reorder the terms: 3x(6 + x2) = 3x3 + 18x (6 * 3x + x2 * 3x) = 3x3 + 18x (18x + 3x3) = 3x3 + 18x Reorder the terms: 18x + 3x3 = 18x + 3x3 Add '-18x' to each side of the equation. 18x + -18x + 3x3 = 18x + -18x + 3x3 Combine like terms: 18x + -18x = 0 0 + 3x3 = 18x + -18x + 3x3 3x3 = 18x + -18x + 3x3 Combine like terms: 18x + -18x = 0 3x3 = 0 + 3x3 3x3 = 3x3 Add '-3x3' to each side of the equation. 3x3 + -3x3 = 3x3 + -3x3 Combine like terms: 3x3 + -3x3 = 0 0 = 3x3 + -3x3 Combine like terms: 3x3 + -3x3 = 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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