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Simplifying 0 = 9x2 + -20x + 4 Reorder the terms: 0 = 4 + -20x + 9x2 Solving 0 = 4 + -20x + 9x2 Solving for variable 'x'. Combine like terms: 0 + -4 = -4 -4 + 20x + -9x2 = 4 + -20x + 9x2 + -4 + 20x + -9x2 Reorder the terms: -4 + 20x + -9x2 = 4 + -4 + -20x + 20x + 9x2 + -9x2 Combine like terms: 4 + -4 = 0 -4 + 20x + -9x2 = 0 + -20x + 20x + 9x2 + -9x2 -4 + 20x + -9x2 = -20x + 20x + 9x2 + -9x2 Combine like terms: -20x + 20x = 0 -4 + 20x + -9x2 = 0 + 9x2 + -9x2 -4 + 20x + -9x2 = 9x2 + -9x2 Combine like terms: 9x2 + -9x2 = 0 -4 + 20x + -9x2 = 0 Factor a trinomial. (-2 + x)(2 + -9x) = 0Subproblem 1
Set the factor '(-2 + x)' equal to zero and attempt to solve: Simplifying -2 + x = 0 Solving -2 + x = 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 + x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + x = 0 + 2 x = 0 + 2 Combine like terms: 0 + 2 = 2 x = 2 Simplifying x = 2Subproblem 2
Set the factor '(2 + -9x)' equal to zero and attempt to solve: Simplifying 2 + -9x = 0 Solving 2 + -9x = 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 + -9x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -9x = 0 + -2 -9x = 0 + -2 Combine like terms: 0 + -2 = -2 -9x = -2 Divide each side by '-9'. x = 0.2222222222 Simplifying x = 0.2222222222Solution
x = {2, 0.2222222222}
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