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Simplifying s2 + 18s + -40 = 0 Reorder the terms: -40 + 18s + s2 = 0 Solving -40 + 18s + s2 = 0 Solving for variable 's'. Factor a trinomial. (-20 + -1s)(2 + -1s) = 0Subproblem 1
Set the factor '(-20 + -1s)' equal to zero and attempt to solve: Simplifying -20 + -1s = 0 Solving -20 + -1s = 0 Move all terms containing s to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + -1s = 0 + 20 Combine like terms: -20 + 20 = 0 0 + -1s = 0 + 20 -1s = 0 + 20 Combine like terms: 0 + 20 = 20 -1s = 20 Divide each side by '-1'. s = -20 Simplifying s = -20Subproblem 2
Set the factor '(2 + -1s)' equal to zero and attempt to solve: Simplifying 2 + -1s = 0 Solving 2 + -1s = 0 Move all terms containing s to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1s = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1s = 0 + -2 -1s = 0 + -2 Combine like terms: 0 + -2 = -2 -1s = -2 Divide each side by '-1'. s = 2 Simplifying s = 2Solution
s = {-20, 2}
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