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Simplifying
-9r2 + 4s2 = 0
Solving
-9r2 + 4s2 = 0
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Add '-4s2' to each side of the equation.
-9r2 + 4s2 + -4s2 = 0 + -4s2
Combine like terms: 4s2 + -4s2 = 0
-9r2 + 0 = 0 + -4s2
-9r2 = 0 + -4s2
Remove the zero:
-9r2 = -4s2
Divide each side by '-9'.
r2 = 0.4444444444s2
Simplifying
r2 = 0.4444444444s2
Take the square root of each side:
r = {-0.666666667s, 0.666666667s}
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