0=8-26m-21m^2

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Solution for 0=8-26m-21m^2 equation:


Simplifying
0 = 8 + -26m + -21m2

Solving
0 = 8 + -26m + -21m2

Solving for variable 'm'.

Combine like terms: 0 + -8 = -8
-8 + 26m + 21m2 = 8 + -26m + -21m2 + -8 + 26m + 21m2

Reorder the terms:
-8 + 26m + 21m2 = 8 + -8 + -26m + 26m + -21m2 + 21m2

Combine like terms: 8 + -8 = 0
-8 + 26m + 21m2 = 0 + -26m + 26m + -21m2 + 21m2
-8 + 26m + 21m2 = -26m + 26m + -21m2 + 21m2

Combine like terms: -26m + 26m = 0
-8 + 26m + 21m2 = 0 + -21m2 + 21m2
-8 + 26m + 21m2 = -21m2 + 21m2

Combine like terms: -21m2 + 21m2 = 0
-8 + 26m + 21m2 = 0

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

Divide each side by '21'.
-0.380952381 + 1.238095238m + m2 = 0

Move the constant term to the right:

Add '0.380952381' to each side of the equation.
-0.380952381 + 1.238095238m + 0.380952381 + m2 = 0 + 0.380952381

Reorder the terms:
-0.380952381 + 0.380952381 + 1.238095238m + m2 = 0 + 0.380952381

Combine like terms: -0.380952381 + 0.380952381 = 0.000000000
0.000000000 + 1.238095238m + m2 = 0 + 0.380952381
1.238095238m + m2 = 0 + 0.380952381

Combine like terms: 0 + 0.380952381 = 0.380952381
1.238095238m + m2 = 0.380952381

The m term is 1.238095238m.  Take half its coefficient (0.619047619).
Square it (0.3832199546) and add it to both sides.

Add '0.3832199546' to each side of the equation.
1.238095238m + 0.3832199546 + m2 = 0.380952381 + 0.3832199546

Reorder the terms:
0.3832199546 + 1.238095238m + m2 = 0.380952381 + 0.3832199546

Combine like terms: 0.380952381 + 0.3832199546 = 0.7641723356
0.3832199546 + 1.238095238m + m2 = 0.7641723356

Factor a perfect square on the left side:
(m + 0.619047619)(m + 0.619047619) = 0.7641723356

Calculate the square root of the right side: 0.874169512

Break this problem into two subproblems by setting 
(m + 0.619047619) equal to 0.874169512 and -0.874169512.

Subproblem 1

m + 0.619047619 = 0.874169512 Simplifying m + 0.619047619 = 0.874169512 Reorder the terms: 0.619047619 + m = 0.874169512 Solving 0.619047619 + m = 0.874169512 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-0.619047619' to each side of the equation. 0.619047619 + -0.619047619 + m = 0.874169512 + -0.619047619 Combine like terms: 0.619047619 + -0.619047619 = 0.000000000 0.000000000 + m = 0.874169512 + -0.619047619 m = 0.874169512 + -0.619047619 Combine like terms: 0.874169512 + -0.619047619 = 0.255121893 m = 0.255121893 Simplifying m = 0.255121893

Subproblem 2

m + 0.619047619 = -0.874169512 Simplifying m + 0.619047619 = -0.874169512 Reorder the terms: 0.619047619 + m = -0.874169512 Solving 0.619047619 + m = -0.874169512 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-0.619047619' to each side of the equation. 0.619047619 + -0.619047619 + m = -0.874169512 + -0.619047619 Combine like terms: 0.619047619 + -0.619047619 = 0.000000000 0.000000000 + m = -0.874169512 + -0.619047619 m = -0.874169512 + -0.619047619 Combine like terms: -0.874169512 + -0.619047619 = -1.493217131 m = -1.493217131 Simplifying m = -1.493217131

Solution

The solution to the problem is based on the solutions from the subproblems. m = {0.255121893, -1.493217131}

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