2+64r^2=66

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Solution for 2+64r^2=66 equation: 


Simplifying
2 + 64r2 = 66

Solving
2 + 64r2 = 66

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-2' to each side of the equation.
2 + -2 + 64r2 = 66 + -2

Combine like terms: 2 + -2 = 0
0 + 64r2 = 66 + -2
64r2 = 66 + -2

Combine like terms: 66 + -2 = 64
64r2 = 64

Divide each side by '64'.
r2 = 1

Simplifying
r2 = 1

Take the square root of each side:
r = {-1, 1}

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