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Simplifying x2 + -14x + 21 = 8 Reorder the terms: 21 + -14x + x2 = 8 Solving 21 + -14x + x2 = 8 Solving for variable 'x'. Reorder the terms: 21 + -8 + -14x + x2 = 8 + -8 Combine like terms: 21 + -8 = 13 13 + -14x + x2 = 8 + -8 Combine like terms: 8 + -8 = 0 13 + -14x + x2 = 0 Factor a trinomial. (1 + -1x)(13 + -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 '(13 + -1x)' equal to zero and attempt to solve: Simplifying 13 + -1x = 0 Solving 13 + -1x = 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 + -1x = 0 + -13 Combine like terms: 13 + -13 = 0 0 + -1x = 0 + -13 -1x = 0 + -13 Combine like terms: 0 + -13 = -13 -1x = -13 Divide each side by '-1'. x = 13 Simplifying x = 13Solution
x = {1, 13}
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