-4m^2-20m+5=0

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Solution for -4m^2-20m+5=0 equation:


Simplifying
-4m2 + -20m + 5 = 0

Reorder the terms:
5 + -20m + -4m2 = 0

Solving
5 + -20m + -4m2 = 0

Solving for variable 'm'.

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
-1.25 + 5m + m2 = 0

Move the constant term to the right:

Add '1.25' to each side of the equation.
-1.25 + 5m + 1.25 + m2 = 0 + 1.25

Reorder the terms:
-1.25 + 1.25 + 5m + m2 = 0 + 1.25

Combine like terms: -1.25 + 1.25 = 0.00
0.00 + 5m + m2 = 0 + 1.25
5m + m2 = 0 + 1.25

Combine like terms: 0 + 1.25 = 1.25
5m + m2 = 1.25

The m term is 5m.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5m + 6.25 + m2 = 1.25 + 6.25

Reorder the terms:
6.25 + 5m + m2 = 1.25 + 6.25

Combine like terms: 1.25 + 6.25 = 7.5
6.25 + 5m + m2 = 7.5

Factor a perfect square on the left side:
(m + 2.5)(m + 2.5) = 7.5

Calculate the square root of the right side: 2.738612788

Break this problem into two subproblems by setting 
(m + 2.5) equal to 2.738612788 and -2.738612788.

Subproblem 1

m + 2.5 = 2.738612788 Simplifying m + 2.5 = 2.738612788 Reorder the terms: 2.5 + m = 2.738612788 Solving 2.5 + m = 2.738612788 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + m = 2.738612788 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + m = 2.738612788 + -2.5 m = 2.738612788 + -2.5 Combine like terms: 2.738612788 + -2.5 = 0.238612788 m = 0.238612788 Simplifying m = 0.238612788

Subproblem 2

m + 2.5 = -2.738612788 Simplifying m + 2.5 = -2.738612788 Reorder the terms: 2.5 + m = -2.738612788 Solving 2.5 + m = -2.738612788 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + m = -2.738612788 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + m = -2.738612788 + -2.5 m = -2.738612788 + -2.5 Combine like terms: -2.738612788 + -2.5 = -5.238612788 m = -5.238612788 Simplifying m = -5.238612788

Solution

The solution to the problem is based on the solutions from the subproblems. m = {0.238612788, -5.238612788}

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