0=m^2-m-100

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Solution for 0=m^2-m-100 equation:


Simplifying
0 = m2 + -1m + -100

Reorder the terms:
0 = -100 + -1m + m2

Solving
0 = -100 + -1m + m2

Solving for variable 'm'.

Combine like terms: 0 + 100 = 100
100 + m + -1m2 = -100 + -1m + m2 + 100 + m + -1m2

Reorder the terms:
100 + m + -1m2 = -100 + 100 + -1m + m + m2 + -1m2

Combine like terms: -100 + 100 = 0
100 + m + -1m2 = 0 + -1m + m + m2 + -1m2
100 + m + -1m2 = -1m + m + m2 + -1m2

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

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

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-100 + -1m + m2 = 0

Move the constant term to the right:

Add '100' to each side of the equation.
-100 + -1m + 100 + m2 = 0 + 100

Reorder the terms:
-100 + 100 + -1m + m2 = 0 + 100

Combine like terms: -100 + 100 = 0
0 + -1m + m2 = 0 + 100
-1m + m2 = 0 + 100

Combine like terms: 0 + 100 = 100
-1m + m2 = 100

The m term is m.  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 = 100 + 0.25

Reorder the terms:
0.25 + -1m + m2 = 100 + 0.25

Combine like terms: 100 + 0.25 = 100.25
0.25 + -1m + m2 = 100.25

Factor a perfect square on the left side:
(m + 0.5)(m + 0.5) = 100.25

Calculate the square root of the right side: 10.012492197

Break this problem into two subproblems by setting 
(m + 0.5) equal to 10.012492197 and -10.012492197.

Subproblem 1

m + 0.5 = 10.012492197 Simplifying m + 0.5 = 10.012492197 Reorder the terms: 0.5 + m = 10.012492197 Solving 0.5 + m = 10.012492197 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + m = 10.012492197 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + m = 10.012492197 + -0.5 m = 10.012492197 + -0.5 Combine like terms: 10.012492197 + -0.5 = 9.512492197 m = 9.512492197 Simplifying m = 9.512492197

Subproblem 2

m + 0.5 = -10.012492197 Simplifying m + 0.5 = -10.012492197 Reorder the terms: 0.5 + m = -10.012492197 Solving 0.5 + m = -10.012492197 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + m = -10.012492197 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + m = -10.012492197 + -0.5 m = -10.012492197 + -0.5 Combine like terms: -10.012492197 + -0.5 = -10.512492197 m = -10.512492197 Simplifying m = -10.512492197

Solution

The solution to the problem is based on the solutions from the subproblems. m = {9.512492197, -10.512492197}

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