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Simplifying f(0) = 2x2 + 9x + 9 Reorder the terms for easier multiplication: 0f = 2x2 + 9x + 9 Anything times zero is zero. 0f = 2x2 + 9x + 9 Reorder the terms: 0 = 9 + 9x + 2x2 Solving 0 = 9 + 9x + 2x2 Solving for variable 'x'. Combine like terms: 0 + -9 = -9 -9 + -9x + -2x2 = 9 + 9x + 2x2 + -9 + -9x + -2x2 Reorder the terms: -9 + -9x + -2x2 = 9 + -9 + 9x + -9x + 2x2 + -2x2 Combine like terms: 9 + -9 = 0 -9 + -9x + -2x2 = 0 + 9x + -9x + 2x2 + -2x2 -9 + -9x + -2x2 = 9x + -9x + 2x2 + -2x2 Combine like terms: 9x + -9x = 0 -9 + -9x + -2x2 = 0 + 2x2 + -2x2 -9 + -9x + -2x2 = 2x2 + -2x2 Combine like terms: 2x2 + -2x2 = 0 -9 + -9x + -2x2 = 0 Factor out the Greatest Common Factor (GCF), '-1'. -1(9 + 9x + 2x2) = 0 Factor a trinomial. -1((3 + x)(3 + 2x)) = 0 Ignore the factor -1.Subproblem 1
Set the factor '(3 + x)' equal to zero and attempt to solve: Simplifying 3 + x = 0 Solving 3 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + x = 0 + -3 x = 0 + -3 Combine like terms: 0 + -3 = -3 x = -3 Simplifying x = -3Subproblem 2
Set the factor '(3 + 2x)' equal to zero and attempt to solve: Simplifying 3 + 2x = 0 Solving 3 + 2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 2x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 2x = 0 + -3 2x = 0 + -3 Combine like terms: 0 + -3 = -3 2x = -3 Divide each side by '2'. x = -1.5 Simplifying x = -1.5Solution
x = {-3, -1.5}
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