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Simplifying 3x(2x + 7) + (2x + 7) = 0 Reorder the terms: 3x(7 + 2x) + (2x + 7) = 0 (7 * 3x + 2x * 3x) + (2x + 7) = 0 (21x + 6x2) + (2x + 7) = 0 Reorder the terms: 21x + 6x2 + (7 + 2x) = 0 Remove parenthesis around (7 + 2x) 21x + 6x2 + 7 + 2x = 0 Reorder the terms: 7 + 21x + 2x + 6x2 = 0 Combine like terms: 21x + 2x = 23x 7 + 23x + 6x2 = 0 Solving 7 + 23x + 6x2 = 0 Solving for variable 'x'. Factor a trinomial. (7 + 2x)(1 + 3x) = 0Subproblem 1
Set the factor '(7 + 2x)' equal to zero and attempt to solve: Simplifying 7 + 2x = 0 Solving 7 + 2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 2x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 2x = 0 + -7 2x = 0 + -7 Combine like terms: 0 + -7 = -7 2x = -7 Divide each side by '2'. x = -3.5 Simplifying x = -3.5Subproblem 2
Set the factor '(1 + 3x)' equal to zero and attempt to solve: Simplifying 1 + 3x = 0 Solving 1 + 3x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 3x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 3x = 0 + -1 3x = 0 + -1 Combine like terms: 0 + -1 = -1 3x = -1 Divide each side by '3'. x = -0.3333333333 Simplifying x = -0.3333333333Solution
x = {-3.5, -0.3333333333}
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