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Simplifying (6x2 + -5x + 12) + (9x2 + 7x + -68) = 0 Reorder the terms: (12 + -5x + 6x2) + (9x2 + 7x + -68) = 0 Remove parenthesis around (12 + -5x + 6x2) 12 + -5x + 6x2 + (9x2 + 7x + -68) = 0 Reorder the terms: 12 + -5x + 6x2 + (-68 + 7x + 9x2) = 0 Remove parenthesis around (-68 + 7x + 9x2) 12 + -5x + 6x2 + -68 + 7x + 9x2 = 0 Reorder the terms: 12 + -68 + -5x + 7x + 6x2 + 9x2 = 0 Combine like terms: 12 + -68 = -56 -56 + -5x + 7x + 6x2 + 9x2 = 0 Combine like terms: -5x + 7x = 2x -56 + 2x + 6x2 + 9x2 = 0 Combine like terms: 6x2 + 9x2 = 15x2 -56 + 2x + 15x2 = 0 Solving -56 + 2x + 15x2 = 0 Solving for variable 'x'. Factor a trinomial. (-2 + -1x)(28 + -15x) = 0Subproblem 1
Set the factor '(-2 + -1x)' equal to zero and attempt to solve: Simplifying -2 + -1x = 0 Solving -2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -1x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1x = 0 + 2 -1x = 0 + 2 Combine like terms: 0 + 2 = 2 -1x = 2 Divide each side by '-1'. x = -2 Simplifying x = -2Subproblem 2
Set the factor '(28 + -15x)' equal to zero and attempt to solve: Simplifying 28 + -15x = 0 Solving 28 + -15x = 0 Move all terms containing x to the left, all other terms to the right. Add '-28' to each side of the equation. 28 + -28 + -15x = 0 + -28 Combine like terms: 28 + -28 = 0 0 + -15x = 0 + -28 -15x = 0 + -28 Combine like terms: 0 + -28 = -28 -15x = -28 Divide each side by '-15'. x = 1.866666667 Simplifying x = 1.866666667Solution
x = {-2, 1.866666667}
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