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Simplifying x2 + -3x + 9 = 7 Reorder the terms: 9 + -3x + x2 = 7 Solving 9 + -3x + x2 = 7 Solving for variable 'x'. Reorder the terms: 9 + -7 + -3x + x2 = 7 + -7 Combine like terms: 9 + -7 = 2 2 + -3x + x2 = 7 + -7 Combine like terms: 7 + -7 = 0 2 + -3x + x2 = 0 Factor a trinomial. (1 + -1x)(2 + -1x) = 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 '(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 = 2Solution
x = {1, 2}
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