20s^2-9sr-20r^2=

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Solution for 20s^2-9sr-20r^2= equation:


Simplifying
20s2 + -9sr + -20r2 = 0

Reorder the terms:
-9rs + -20r2 + 20s2 = 0

Solving
-9rs + -20r2 + 20s2 = 0

Solving for variable 'r'.

Factor a trinomial.
(-4r + -5s)(5r + -4s) = 0

Subproblem 1

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 = -1.25s

Subproblem 2

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 = 0.8s

Solution

r = {-1.25s, 0.8s}

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