m^2-4m=-9

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Solution for m^2-4m=-9 equation:


Simplifying
m2 + -4m = -9

Reorder the terms:
-4m + m2 = -9

Solving
-4m + m2 = -9

Solving for variable 'm'.

Reorder the terms:
9 + -4m + m2 = -9 + 9

Combine like terms: -9 + 9 = 0
9 + -4m + m2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-9' to each side of the equation.
9 + -4m + -9 + m2 = 0 + -9

Reorder the terms:
9 + -9 + -4m + m2 = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -4m + m2 = 0 + -9
-4m + m2 = 0 + -9

Combine like terms: 0 + -9 = -9
-4m + m2 = -9

The m term is -4m.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4m + 4 + m2 = -9 + 4

Reorder the terms:
4 + -4m + m2 = -9 + 4

Combine like terms: -9 + 4 = -5
4 + -4m + m2 = -5

Factor a perfect square on the left side:
(m + -2)(m + -2) = -5

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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