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Simplifying x2 + 15x + 80 = 180 Reorder the terms: 80 + 15x + x2 = 180 Solving 80 + 15x + x2 = 180 Solving for variable 'x'. Reorder the terms: 80 + -180 + 15x + x2 = 180 + -180 Combine like terms: 80 + -180 = -100 -100 + 15x + x2 = 180 + -180 Combine like terms: 180 + -180 = 0 -100 + 15x + x2 = 0 Factor a trinomial. (-20 + -1x)(5 + -1x) = 0Subproblem 1
Set the factor '(-20 + -1x)' equal to zero and attempt to solve: Simplifying -20 + -1x = 0 Solving -20 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + -1x = 0 + 20 Combine like terms: -20 + 20 = 0 0 + -1x = 0 + 20 -1x = 0 + 20 Combine like terms: 0 + 20 = 20 -1x = 20 Divide each side by '-1'. x = -20 Simplifying x = -20Subproblem 2
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 = 5Solution
x = {-20, 5}
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