m^2-4m=4

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


Simplifying
m2 + -4m = 4

Reorder the terms:
-4m + m2 = 4

Solving
-4m + m2 = 4

Solving for variable 'm'.

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

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

Begin completing the square.

Move the constant term to the right:

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

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

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

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

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 = 4 + 4

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

Combine like terms: 4 + 4 = 8
4 + -4m + m2 = 8

Factor a perfect square on the left side:
(m + -2)(m + -2) = 8

Calculate the square root of the right side: 2.828427125

Break this problem into two subproblems by setting 
(m + -2) equal to 2.828427125 and -2.828427125.

Subproblem 1

m + -2 = 2.828427125 Simplifying m + -2 = 2.828427125 Reorder the terms: -2 + m = 2.828427125 Solving -2 + m = 2.828427125 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + m = 2.828427125 + 2 Combine like terms: -2 + 2 = 0 0 + m = 2.828427125 + 2 m = 2.828427125 + 2 Combine like terms: 2.828427125 + 2 = 4.828427125 m = 4.828427125 Simplifying m = 4.828427125

Subproblem 2

m + -2 = -2.828427125 Simplifying m + -2 = -2.828427125 Reorder the terms: -2 + m = -2.828427125 Solving -2 + m = -2.828427125 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + m = -2.828427125 + 2 Combine like terms: -2 + 2 = 0 0 + m = -2.828427125 + 2 m = -2.828427125 + 2 Combine like terms: -2.828427125 + 2 = -0.828427125 m = -0.828427125 Simplifying m = -0.828427125

Solution

The solution to the problem is based on the solutions from the subproblems. m = {4.828427125, -0.828427125}

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