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Simplifying 2x(60 + -2x) + -400 = 100 (60 * 2x + -2x * 2x) + -400 = 100 (120x + -4x2) + -400 = 100 Reorder the terms: -400 + 120x + -4x2 = 100 Solving -400 + 120x + -4x2 = 100 Solving for variable 'x'. Reorder the terms: -400 + -100 + 120x + -4x2 = 100 + -100 Combine like terms: -400 + -100 = -500 -500 + 120x + -4x2 = 100 + -100 Combine like terms: 100 + -100 = 0 -500 + 120x + -4x2 = 0 Factor out the Greatest Common Factor (GCF), '4'. 4(-125 + 30x + -1x2) = 0 Factor a trinomial. 4((-25 + x)(5 + -1x)) = 0 Ignore the factor 4.Subproblem 1
Set the factor '(-25 + x)' equal to zero and attempt to solve: Simplifying -25 + x = 0 Solving -25 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '25' to each side of the equation. -25 + 25 + x = 0 + 25 Combine like terms: -25 + 25 = 0 0 + x = 0 + 25 x = 0 + 25 Combine like terms: 0 + 25 = 25 x = 25 Simplifying x = 25Subproblem 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 = {25, 5}
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