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Simplifying 20r2 + 9rs + -20s2 = 0 Reorder the terms: 9rs + 20r2 + -20s2 = 0 Solving 9rs + 20r2 + -20s2 = 0 Solving for variable 'r'. Factor a trinomial. (5r + -4s)(4r + 5s) = 0Subproblem 1
Set the factor '(5r + -4s)' equal to zero and attempt to solve: Simplifying 5r + -4s = 0 Solving 5r + -4s = 0 Move all terms containing r to the left, all other terms to the right. Add '4s' to each side of the equation. 5r + -4s + 4s = 0 + 4s Combine like terms: -4s + 4s = 0 5r + 0 = 0 + 4s 5r = 0 + 4s Remove the zero: 5r = 4s Divide each side by '5'. r = 0.8s Simplifying r = 0.8sSubproblem 2
Set the factor '(4r + 5s)' equal to zero and attempt to solve: Simplifying 4r + 5s = 0 Solving 4r + 5s = 0 Move all terms containing r to the left, all other terms to the right. Add '-5s' to each side of the equation. 4r + 5s + -5s = 0 + -5s Combine like terms: 5s + -5s = 0 4r + 0 = 0 + -5s 4r = 0 + -5s Remove the zero: 4r = -5s Divide each side by '4'. r = -1.25s Simplifying r = -1.25sSolution
r = {0.8s, -1.25s}
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