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Simplifying 0 = 2x2 + 19x + 9 Reorder the terms: 0 = 9 + 19x + 2x2 Solving 0 = 9 + 19x + 2x2 Solving for variable 'x'. Combine like terms: 0 + -9 = -9 -9 + -19x + -2x2 = 9 + 19x + 2x2 + -9 + -19x + -2x2 Reorder the terms: -9 + -19x + -2x2 = 9 + -9 + 19x + -19x + 2x2 + -2x2 Combine like terms: 9 + -9 = 0 -9 + -19x + -2x2 = 0 + 19x + -19x + 2x2 + -2x2 -9 + -19x + -2x2 = 19x + -19x + 2x2 + -2x2 Combine like terms: 19x + -19x = 0 -9 + -19x + -2x2 = 0 + 2x2 + -2x2 -9 + -19x + -2x2 = 2x2 + -2x2 Combine like terms: 2x2 + -2x2 = 0 -9 + -19x + -2x2 = 0 Factor out the Greatest Common Factor (GCF), '-1'. -1(9 + 19x + 2x2) = 0 Factor a trinomial. -1((9 + x)(1 + 2x)) = 0 Ignore the factor -1.Subproblem 1
Set the factor '(9 + x)' equal to zero and attempt to solve: Simplifying 9 + x = 0 Solving 9 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + x = 0 + -9 x = 0 + -9 Combine like terms: 0 + -9 = -9 x = -9 Simplifying x = -9Subproblem 2
Set the factor '(1 + 2x)' equal to zero and attempt to solve: Simplifying 1 + 2x = 0 Solving 1 + 2x = 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 + 2x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 2x = 0 + -1 2x = 0 + -1 Combine like terms: 0 + -1 = -1 2x = -1 Divide each side by '2'. x = -0.5 Simplifying x = -0.5Solution
x = {-9, -0.5}
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