15m^2+31m+2=8

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Solution for 15m^2+31m+2=8 equation:


Simplifying
15m2 + 31m + 2 = 8

Reorder the terms:
2 + 31m + 15m2 = 8

Solving
2 + 31m + 15m2 = 8

Solving for variable 'm'.

Reorder the terms:
2 + -8 + 31m + 15m2 = 8 + -8

Combine like terms: 2 + -8 = -6
-6 + 31m + 15m2 = 8 + -8

Combine like terms: 8 + -8 = 0
-6 + 31m + 15m2 = 0

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

Divide each side by '15'.
-0.4 + 2.066666667m + m2 = 0

Move the constant term to the right:

Add '0.4' to each side of the equation.
-0.4 + 2.066666667m + 0.4 + m2 = 0 + 0.4

Reorder the terms:
-0.4 + 0.4 + 2.066666667m + m2 = 0 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + 2.066666667m + m2 = 0 + 0.4
2.066666667m + m2 = 0 + 0.4

Combine like terms: 0 + 0.4 = 0.4
2.066666667m + m2 = 0.4

The m term is 2.066666667m.  Take half its coefficient (1.033333334).
Square it (1.067777779) and add it to both sides.

Add '1.067777779' to each side of the equation.
2.066666667m + 1.067777779 + m2 = 0.4 + 1.067777779

Reorder the terms:
1.067777779 + 2.066666667m + m2 = 0.4 + 1.067777779

Combine like terms: 0.4 + 1.067777779 = 1.467777779
1.067777779 + 2.066666667m + m2 = 1.467777779

Factor a perfect square on the left side:
(m + 1.033333334)(m + 1.033333334) = 1.467777779

Calculate the square root of the right side: 1.21151879

Break this problem into two subproblems by setting 
(m + 1.033333334) equal to 1.21151879 and -1.21151879.

Subproblem 1

m + 1.033333334 = 1.21151879 Simplifying m + 1.033333334 = 1.21151879 Reorder the terms: 1.033333334 + m = 1.21151879 Solving 1.033333334 + m = 1.21151879 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-1.033333334' to each side of the equation. 1.033333334 + -1.033333334 + m = 1.21151879 + -1.033333334 Combine like terms: 1.033333334 + -1.033333334 = 0.000000000 0.000000000 + m = 1.21151879 + -1.033333334 m = 1.21151879 + -1.033333334 Combine like terms: 1.21151879 + -1.033333334 = 0.178185456 m = 0.178185456 Simplifying m = 0.178185456

Subproblem 2

m + 1.033333334 = -1.21151879 Simplifying m + 1.033333334 = -1.21151879 Reorder the terms: 1.033333334 + m = -1.21151879 Solving 1.033333334 + m = -1.21151879 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-1.033333334' to each side of the equation. 1.033333334 + -1.033333334 + m = -1.21151879 + -1.033333334 Combine like terms: 1.033333334 + -1.033333334 = 0.000000000 0.000000000 + m = -1.21151879 + -1.033333334 m = -1.21151879 + -1.033333334 Combine like terms: -1.21151879 + -1.033333334 = -2.244852124 m = -2.244852124 Simplifying m = -2.244852124

Solution

The solution to the problem is based on the solutions from the subproblems. m = {0.178185456, -2.244852124}

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