2m^2+5m-13=0

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Solution for 2m^2+5m-13=0 equation:


Simplifying
2m2 + 5m + -13 = 0

Reorder the terms:
-13 + 5m + 2m2 = 0

Solving
-13 + 5m + 2m2 = 0

Solving for variable 'm'.

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

Divide each side by '2'.
-6.5 + 2.5m + m2 = 0

Move the constant term to the right:

Add '6.5' to each side of the equation.
-6.5 + 2.5m + 6.5 + m2 = 0 + 6.5

Reorder the terms:
-6.5 + 6.5 + 2.5m + m2 = 0 + 6.5

Combine like terms: -6.5 + 6.5 = 0.0
0.0 + 2.5m + m2 = 0 + 6.5
2.5m + m2 = 0 + 6.5

Combine like terms: 0 + 6.5 = 6.5
2.5m + m2 = 6.5

The m term is 2.5m.  Take half its coefficient (1.25).
Square it (1.5625) and add it to both sides.

Add '1.5625' to each side of the equation.
2.5m + 1.5625 + m2 = 6.5 + 1.5625

Reorder the terms:
1.5625 + 2.5m + m2 = 6.5 + 1.5625

Combine like terms: 6.5 + 1.5625 = 8.0625
1.5625 + 2.5m + m2 = 8.0625

Factor a perfect square on the left side:
(m + 1.25)(m + 1.25) = 8.0625

Calculate the square root of the right side: 2.839454173

Break this problem into two subproblems by setting 
(m + 1.25) equal to 2.839454173 and -2.839454173.

Subproblem 1

m + 1.25 = 2.839454173 Simplifying m + 1.25 = 2.839454173 Reorder the terms: 1.25 + m = 2.839454173 Solving 1.25 + m = 2.839454173 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + m = 2.839454173 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + m = 2.839454173 + -1.25 m = 2.839454173 + -1.25 Combine like terms: 2.839454173 + -1.25 = 1.589454173 m = 1.589454173 Simplifying m = 1.589454173

Subproblem 2

m + 1.25 = -2.839454173 Simplifying m + 1.25 = -2.839454173 Reorder the terms: 1.25 + m = -2.839454173 Solving 1.25 + m = -2.839454173 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-1.25' to each side of the equation. 1.25 + -1.25 + m = -2.839454173 + -1.25 Combine like terms: 1.25 + -1.25 = 0.00 0.00 + m = -2.839454173 + -1.25 m = -2.839454173 + -1.25 Combine like terms: -2.839454173 + -1.25 = -4.089454173 m = -4.089454173 Simplifying m = -4.089454173

Solution

The solution to the problem is based on the solutions from the subproblems. m = {1.589454173, -4.089454173}

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