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Simplifying 2x2 + -1x + -1 = 9 Reorder the terms: -1 + -1x + 2x2 = 9 Solving -1 + -1x + 2x2 = 9 Solving for variable 'x'. Reorder the terms: -1 + -9 + -1x + 2x2 = 9 + -9 Combine like terms: -1 + -9 = -10 -10 + -1x + 2x2 = 9 + -9 Combine like terms: 9 + -9 = 0 -10 + -1x + 2x2 = 0 Factor a trinomial. (-2 + -1x)(5 + -2x) = 0Subproblem 1
Set the factor '(-2 + -1x)' equal to zero and attempt to solve: Simplifying -2 + -1x = 0 Solving -2 + -1x = 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 + -1x = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1x = 0 + 2 -1x = 0 + 2 Combine like terms: 0 + 2 = 2 -1x = 2 Divide each side by '-1'. x = -2 Simplifying x = -2Subproblem 2
Set the factor '(5 + -2x)' equal to zero and attempt to solve: Simplifying 5 + -2x = 0 Solving 5 + -2x = 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 + -2x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -2x = 0 + -5 -2x = 0 + -5 Combine like terms: 0 + -5 = -5 -2x = -5 Divide each side by '-2'. x = 2.5 Simplifying x = 2.5Solution
x = {-2, 2.5}
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