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Simplifying 0 = x2 + -28x + 180 Reorder the terms: 0 = 180 + -28x + x2 Solving 0 = 180 + -28x + x2 Solving for variable 'x'. Combine like terms: 0 + -180 = -180 -180 + 28x + -1x2 = 180 + -28x + x2 + -180 + 28x + -1x2 Reorder the terms: -180 + 28x + -1x2 = 180 + -180 + -28x + 28x + x2 + -1x2 Combine like terms: 180 + -180 = 0 -180 + 28x + -1x2 = 0 + -28x + 28x + x2 + -1x2 -180 + 28x + -1x2 = -28x + 28x + x2 + -1x2 Combine like terms: -28x + 28x = 0 -180 + 28x + -1x2 = 0 + x2 + -1x2 -180 + 28x + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -180 + 28x + -1x2 = 0 Factor a trinomial. (-18 + x)(10 + -1x) = 0Subproblem 1
Set the factor '(-18 + x)' equal to zero and attempt to solve: Simplifying -18 + x = 0 Solving -18 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + x = 0 + 18 Combine like terms: -18 + 18 = 0 0 + x = 0 + 18 x = 0 + 18 Combine like terms: 0 + 18 = 18 x = 18 Simplifying x = 18Subproblem 2
Set the factor '(10 + -1x)' equal to zero and attempt to solve: Simplifying 10 + -1x = 0 Solving 10 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + -1x = 0 + -10 Combine like terms: 10 + -10 = 0 0 + -1x = 0 + -10 -1x = 0 + -10 Combine like terms: 0 + -10 = -10 -1x = -10 Divide each side by '-1'. x = 10 Simplifying x = 10Solution
x = {18, 10}
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