m^2+21=m

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Solution for m^2+21=m equation:


Simplifying
m2 + 21 = m

Reorder the terms:
21 + m2 = m

Solving
21 + m2 = m

Solving for variable 'm'.

Reorder the terms:
21 + -1m + m2 = m + -1m

Combine like terms: m + -1m = 0
21 + -1m + m2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-21' to each side of the equation.
21 + -1m + -21 + m2 = 0 + -21

Reorder the terms:
21 + -21 + -1m + m2 = 0 + -21

Combine like terms: 21 + -21 = 0
0 + -1m + m2 = 0 + -21
-1m + m2 = 0 + -21

Combine like terms: 0 + -21 = -21
-1m + m2 = -21

The m term is -1m.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1m + 0.25 + m2 = -21 + 0.25

Reorder the terms:
0.25 + -1m + m2 = -21 + 0.25

Combine like terms: -21 + 0.25 = -20.75
0.25 + -1m + m2 = -20.75

Factor a perfect square on the left side:
(m + -0.5)(m + -0.5) = -20.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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