r(r-2m)=-2ml

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Solution for r(r-2m)=-2ml equation: 


Simplifying
r(r + -2m) = -2ml

Reorder the terms:
r(-2m + r) = -2ml
(-2m * r + r * r) = -2ml
(-2mr + r2) = -2ml

Solving
-2mr + r2 = -2lm

Solving for variable 'm'.

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

Add '2lm' to each side of the equation.
-2mr + 2lm + r2 = -2lm + 2lm

Reorder the terms:
2lm + -2mr + r2 = -2lm + 2lm

Combine like terms: -2lm + 2lm = 0
2lm + -2mr + r2 = 0

Add '-1r2' to each side of the equation.
2lm + -2mr + r2 + -1r2 = 0 + -1r2

Combine like terms: r2 + -1r2 = 0
2lm + -2mr + 0 = 0 + -1r2
2lm + -2mr = 0 + -1r2
Remove the zero:
2lm + -2mr = -1r2

Combine like terms: -1r2 + r2 = 0
2lm + -2mr + r2 = 0

The solution to this equation could not be determined.

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