2m^2-25m-90=0

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Solution for 2m^2-25m-90=0 equation:


Simplifying
2m2 + -25m + -90 = 0

Reorder the terms:
-90 + -25m + 2m2 = 0

Solving
-90 + -25m + 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'.
-45 + -12.5m + m2 = 0

Move the constant term to the right:

Add '45' to each side of the equation.
-45 + -12.5m + 45 + m2 = 0 + 45

Reorder the terms:
-45 + 45 + -12.5m + m2 = 0 + 45

Combine like terms: -45 + 45 = 0
0 + -12.5m + m2 = 0 + 45
-12.5m + m2 = 0 + 45

Combine like terms: 0 + 45 = 45
-12.5m + m2 = 45

The m term is -12.5m.  Take half its coefficient (-6.25).
Square it (39.0625) and add it to both sides.

Add '39.0625' to each side of the equation.
-12.5m + 39.0625 + m2 = 45 + 39.0625

Reorder the terms:
39.0625 + -12.5m + m2 = 45 + 39.0625

Combine like terms: 45 + 39.0625 = 84.0625
39.0625 + -12.5m + m2 = 84.0625

Factor a perfect square on the left side:
(m + -6.25)(m + -6.25) = 84.0625

Calculate the square root of the right side: 9.16856041

Break this problem into two subproblems by setting 
(m + -6.25) equal to 9.16856041 and -9.16856041.

Subproblem 1

m + -6.25 = 9.16856041 Simplifying m + -6.25 = 9.16856041 Reorder the terms: -6.25 + m = 9.16856041 Solving -6.25 + m = 9.16856041 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '6.25' to each side of the equation. -6.25 + 6.25 + m = 9.16856041 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + m = 9.16856041 + 6.25 m = 9.16856041 + 6.25 Combine like terms: 9.16856041 + 6.25 = 15.41856041 m = 15.41856041 Simplifying m = 15.41856041

Subproblem 2

m + -6.25 = -9.16856041 Simplifying m + -6.25 = -9.16856041 Reorder the terms: -6.25 + m = -9.16856041 Solving -6.25 + m = -9.16856041 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '6.25' to each side of the equation. -6.25 + 6.25 + m = -9.16856041 + 6.25 Combine like terms: -6.25 + 6.25 = 0.00 0.00 + m = -9.16856041 + 6.25 m = -9.16856041 + 6.25 Combine like terms: -9.16856041 + 6.25 = -2.91856041 m = -2.91856041 Simplifying m = -2.91856041

Solution

The solution to the problem is based on the solutions from the subproblems. m = {15.41856041, -2.91856041}

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