r^2-18-56=6

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Solution for r^2-18-56=6 equation:


Simplifying
r2 + -18 + -56 = 6

Reorder the terms:
-18 + -56 + r2 = 6

Combine like terms: -18 + -56 = -74
-74 + r2 = 6

Solving
-74 + r2 = 6

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 + r2 = 6 + 74

Combine like terms: -74 + 74 = 0
0 + r2 = 6 + 74
r2 = 6 + 74

Combine like terms: 6 + 74 = 80
r2 = 80

Simplifying
r2 = 80

Take the square root of each side:
r = {-8.94427191, 8.94427191}

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