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Simplifying 9x(x + 5) + -8(x + 5) = 0 Reorder the terms: 9x(5 + x) + -8(x + 5) = 0 (5 * 9x + x * 9x) + -8(x + 5) = 0 (45x + 9x2) + -8(x + 5) = 0 Reorder the terms: 45x + 9x2 + -8(5 + x) = 0 45x + 9x2 + (5 * -8 + x * -8) = 0 45x + 9x2 + (-40 + -8x) = 0 Reorder the terms: -40 + 45x + -8x + 9x2 = 0 Combine like terms: 45x + -8x = 37x -40 + 37x + 9x2 = 0 Solving -40 + 37x + 9x2 = 0 Solving for variable 'x'. Factor a trinomial. (-5 + -1x)(8 + -9x) = 0Subproblem 1
Set the factor '(-5 + -1x)' equal to zero and attempt to solve: Simplifying -5 + -1x = 0 Solving -5 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + -1x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -1x = 0 + 5 -1x = 0 + 5 Combine like terms: 0 + 5 = 5 -1x = 5 Divide each side by '-1'. x = -5 Simplifying x = -5Subproblem 2
Set the factor '(8 + -9x)' equal to zero and attempt to solve: Simplifying 8 + -9x = 0 Solving 8 + -9x = 0 Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + -9x = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -9x = 0 + -8 -9x = 0 + -8 Combine like terms: 0 + -8 = -8 -9x = -8 Divide each side by '-9'. x = 0.8888888889 Simplifying x = 0.8888888889Solution
x = {-5, 0.8888888889}
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