r^2-12r=-88

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Solution for r^2-12r=-88 equation:


Simplifying
r2 + -12r = -88

Reorder the terms:
-12r + r2 = -88

Solving
-12r + r2 = -88

Solving for variable 'r'.

Reorder the terms:
88 + -12r + r2 = -88 + 88

Combine like terms: -88 + 88 = 0
88 + -12r + r2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-88' to each side of the equation.
88 + -12r + -88 + r2 = 0 + -88

Reorder the terms:
88 + -88 + -12r + r2 = 0 + -88

Combine like terms: 88 + -88 = 0
0 + -12r + r2 = 0 + -88
-12r + r2 = 0 + -88

Combine like terms: 0 + -88 = -88
-12r + r2 = -88

The r term is -12r.  Take half its coefficient (-6).
Square it (36) and add it to both sides.

Add '36' to each side of the equation.
-12r + 36 + r2 = -88 + 36

Reorder the terms:
36 + -12r + r2 = -88 + 36

Combine like terms: -88 + 36 = -52
36 + -12r + r2 = -52

Factor a perfect square on the left side:
(r + -6)(r + -6) = -52

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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