3r^2+8-82=-2

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Solution for 3r^2+8-82=-2 equation:


Simplifying
3r2 + 8 + -82 = -2

Reorder the terms:
8 + -82 + 3r2 = -2

Combine like terms: 8 + -82 = -74
-74 + 3r2 = -2

Solving
-74 + 3r2 = -2

Solving for variable 'r'.

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

Add '74' to each side of the equation.
-74 + 74 + 3r2 = -2 + 74

Combine like terms: -74 + 74 = 0
0 + 3r2 = -2 + 74
3r2 = -2 + 74

Combine like terms: -2 + 74 = 72
3r2 = 72

Divide each side by '3'.
r2 = 24

Simplifying
r2 = 24

Take the square root of each side:
r = {-4.898979486, 4.898979486}

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