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Simplifying x(9x + -4) = 13 Reorder the terms: x(-4 + 9x) = 13 (-4 * x + 9x * x) = 13 (-4x + 9x2) = 13 Solving -4x + 9x2 = 13 Solving for variable 'x'. Reorder the terms: -13 + -4x + 9x2 = 13 + -13 Combine like terms: 13 + -13 = 0 -13 + -4x + 9x2 = 0 Factor a trinomial. (-1 + -1x)(13 + -9x) = 0Subproblem 1
Set the factor '(-1 + -1x)' equal to zero and attempt to solve: Simplifying -1 + -1x = 0 Solving -1 + -1x = 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 + -1x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -1x = 0 + 1 -1x = 0 + 1 Combine like terms: 0 + 1 = 1 -1x = 1 Divide each side by '-1'. x = -1 Simplifying x = -1Subproblem 2
Set the factor '(13 + -9x)' equal to zero and attempt to solve: Simplifying 13 + -9x = 0 Solving 13 + -9x = 0 Move all terms containing x to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + -9x = 0 + -13 Combine like terms: 13 + -13 = 0 0 + -9x = 0 + -13 -9x = 0 + -13 Combine like terms: 0 + -13 = -13 -9x = -13 Divide each side by '-9'. x = 1.444444444 Simplifying x = 1.444444444Solution
x = {-1, 1.444444444}
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