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Simplifying (x + 20)(x + -5) = 0 Reorder the terms: (20 + x)(x + -5) = 0 Reorder the terms: (20 + x)(-5 + x) = 0 Multiply (20 + x) * (-5 + x) (20(-5 + x) + x(-5 + x)) = 0 ((-5 * 20 + x * 20) + x(-5 + x)) = 0 ((-100 + 20x) + x(-5 + x)) = 0 (-100 + 20x + (-5 * x + x * x)) = 0 (-100 + 20x + (-5x + x2)) = 0 Combine like terms: 20x + -5x = 15x (-100 + 15x + x2) = 0 Solving -100 + 15x + x2 = 0 Solving for variable 'x'. 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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