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Simplifying
100r2 + -9 = 0
Reorder the terms:
-9 + 100r2 = 0
Solving
-9 + 100r2 = 0
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Add '9' to each side of the equation.
-9 + 9 + 100r2 = 0 + 9
Combine like terms: -9 + 9 = 0
0 + 100r2 = 0 + 9
100r2 = 0 + 9
Combine like terms: 0 + 9 = 9
100r2 = 9
Divide each side by '100'.
r2 = 0.09
Simplifying
r2 = 0.09
Take the square root of each side:
r = {-0.3, 0.3}
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