m^2-8m=-5

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Solution for m^2-8m=-5 equation:


Simplifying
m2 + -8m = -5

Reorder the terms:
-8m + m2 = -5

Solving
-8m + m2 = -5

Solving for variable 'm'.

Reorder the terms:
5 + -8m + m2 = -5 + 5

Combine like terms: -5 + 5 = 0
5 + -8m + m2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-5' to each side of the equation.
5 + -8m + -5 + m2 = 0 + -5

Reorder the terms:
5 + -5 + -8m + m2 = 0 + -5

Combine like terms: 5 + -5 = 0
0 + -8m + m2 = 0 + -5
-8m + m2 = 0 + -5

Combine like terms: 0 + -5 = -5
-8m + m2 = -5

The m term is -8m.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8m + 16 + m2 = -5 + 16

Reorder the terms:
16 + -8m + m2 = -5 + 16

Combine like terms: -5 + 16 = 11
16 + -8m + m2 = 11

Factor a perfect square on the left side:
(m + -4)(m + -4) = 11

Calculate the square root of the right side: 3.31662479

Break this problem into two subproblems by setting 
(m + -4) equal to 3.31662479 and -3.31662479.

Subproblem 1

m + -4 = 3.31662479 Simplifying m + -4 = 3.31662479 Reorder the terms: -4 + m = 3.31662479 Solving -4 + m = 3.31662479 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + m = 3.31662479 + 4 Combine like terms: -4 + 4 = 0 0 + m = 3.31662479 + 4 m = 3.31662479 + 4 Combine like terms: 3.31662479 + 4 = 7.31662479 m = 7.31662479 Simplifying m = 7.31662479

Subproblem 2

m + -4 = -3.31662479 Simplifying m + -4 = -3.31662479 Reorder the terms: -4 + m = -3.31662479 Solving -4 + m = -3.31662479 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + m = -3.31662479 + 4 Combine like terms: -4 + 4 = 0 0 + m = -3.31662479 + 4 m = -3.31662479 + 4 Combine like terms: -3.31662479 + 4 = 0.68337521 m = 0.68337521 Simplifying m = 0.68337521

Solution

The solution to the problem is based on the solutions from the subproblems. m = {7.31662479, 0.68337521}

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