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Simplifying
3r2 + 4 = 73
Reorder the terms:
4 + 3r2 = 73
Solving
4 + 3r2 = 73
Solving for variable 'r'.
Move all terms containing r to the left, all other terms to the right.
Add '-4' to each side of the equation.
4 + -4 + 3r2 = 73 + -4
Combine like terms: 4 + -4 = 0
0 + 3r2 = 73 + -4
3r2 = 73 + -4
Combine like terms: 73 + -4 = 69
3r2 = 69
Divide each side by '3'.
r2 = 23
Simplifying
r2 = 23
Take the square root of each side:
r = {-4.795831523, 4.795831523}
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