8m^2+86m+117=0

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Solution for 8m^2+86m+117=0 equation:


Simplifying
8m2 + 86m + 117 = 0

Reorder the terms:
117 + 86m + 8m2 = 0

Solving
117 + 86m + 8m2 = 0

Solving for variable 'm'.

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

Divide each side by '8'.
14.625 + 10.75m + m2 = 0

Move the constant term to the right:

Add '-14.625' to each side of the equation.
14.625 + 10.75m + -14.625 + m2 = 0 + -14.625

Reorder the terms:
14.625 + -14.625 + 10.75m + m2 = 0 + -14.625

Combine like terms: 14.625 + -14.625 = 0.000
0.000 + 10.75m + m2 = 0 + -14.625
10.75m + m2 = 0 + -14.625

Combine like terms: 0 + -14.625 = -14.625
10.75m + m2 = -14.625

The m term is 10.75m.  Take half its coefficient (5.375).
Square it (28.890625) and add it to both sides.

Add '28.890625' to each side of the equation.
10.75m + 28.890625 + m2 = -14.625 + 28.890625

Reorder the terms:
28.890625 + 10.75m + m2 = -14.625 + 28.890625

Combine like terms: -14.625 + 28.890625 = 14.265625
28.890625 + 10.75m + m2 = 14.265625

Factor a perfect square on the left side:
(m + 5.375)(m + 5.375) = 14.265625

Calculate the square root of the right side: 3.776986232

Break this problem into two subproblems by setting 
(m + 5.375) equal to 3.776986232 and -3.776986232.

Subproblem 1

m + 5.375 = 3.776986232 Simplifying m + 5.375 = 3.776986232 Reorder the terms: 5.375 + m = 3.776986232 Solving 5.375 + m = 3.776986232 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-5.375' to each side of the equation. 5.375 + -5.375 + m = 3.776986232 + -5.375 Combine like terms: 5.375 + -5.375 = 0.000 0.000 + m = 3.776986232 + -5.375 m = 3.776986232 + -5.375 Combine like terms: 3.776986232 + -5.375 = -1.598013768 m = -1.598013768 Simplifying m = -1.598013768

Subproblem 2

m + 5.375 = -3.776986232 Simplifying m + 5.375 = -3.776986232 Reorder the terms: 5.375 + m = -3.776986232 Solving 5.375 + m = -3.776986232 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-5.375' to each side of the equation. 5.375 + -5.375 + m = -3.776986232 + -5.375 Combine like terms: 5.375 + -5.375 = 0.000 0.000 + m = -3.776986232 + -5.375 m = -3.776986232 + -5.375 Combine like terms: -3.776986232 + -5.375 = -9.151986232 m = -9.151986232 Simplifying m = -9.151986232

Solution

The solution to the problem is based on the solutions from the subproblems. m = {-1.598013768, -9.151986232}

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