R=r^2-2r-4

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Solution for R=r^2-2r-4 equation: 


Simplifying
R = r2 + -2r + -4

Reorder the terms:
R = -4 + -2r + r2

Solving
R = -4 + -2r + r2

Solving for variable 'R'.

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

Simplifying
R = -4 + -2r + r2

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