5m-2m(m-5)=19

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Solution for 5m-2m(m-5)=19 equation:


Simplifying
5m + -2m(m + -5) = 19

Reorder the terms:
5m + -2m(-5 + m) = 19
5m + (-5 * -2m + m * -2m) = 19
5m + (10m + -2m2) = 19

Combine like terms: 5m + 10m = 15m
15m + -2m2 = 19

Solving
15m + -2m2 = 19

Solving for variable 'm'.

Reorder the terms:
-19 + 15m + -2m2 = 19 + -19

Combine like terms: 19 + -19 = 0
-19 + 15m + -2m2 = 0

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

Divide each side by '-2'.
9.5 + -7.5m + m2 = 0

Move the constant term to the right:

Add '-9.5' to each side of the equation.
9.5 + -7.5m + -9.5 + m2 = 0 + -9.5

Reorder the terms:
9.5 + -9.5 + -7.5m + m2 = 0 + -9.5

Combine like terms: 9.5 + -9.5 = 0.0
0.0 + -7.5m + m2 = 0 + -9.5
-7.5m + m2 = 0 + -9.5

Combine like terms: 0 + -9.5 = -9.5
-7.5m + m2 = -9.5

The m term is -7.5m.  Take half its coefficient (-3.75).
Square it (14.0625) and add it to both sides.

Add '14.0625' to each side of the equation.
-7.5m + 14.0625 + m2 = -9.5 + 14.0625

Reorder the terms:
14.0625 + -7.5m + m2 = -9.5 + 14.0625

Combine like terms: -9.5 + 14.0625 = 4.5625
14.0625 + -7.5m + m2 = 4.5625

Factor a perfect square on the left side:
(m + -3.75)(m + -3.75) = 4.5625

Calculate the square root of the right side: 2.136000936

Break this problem into two subproblems by setting 
(m + -3.75) equal to 2.136000936 and -2.136000936.

Subproblem 1

m + -3.75 = 2.136000936 Simplifying m + -3.75 = 2.136000936 Reorder the terms: -3.75 + m = 2.136000936 Solving -3.75 + m = 2.136000936 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '3.75' to each side of the equation. -3.75 + 3.75 + m = 2.136000936 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + m = 2.136000936 + 3.75 m = 2.136000936 + 3.75 Combine like terms: 2.136000936 + 3.75 = 5.886000936 m = 5.886000936 Simplifying m = 5.886000936

Subproblem 2

m + -3.75 = -2.136000936 Simplifying m + -3.75 = -2.136000936 Reorder the terms: -3.75 + m = -2.136000936 Solving -3.75 + m = -2.136000936 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '3.75' to each side of the equation. -3.75 + 3.75 + m = -2.136000936 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + m = -2.136000936 + 3.75 m = -2.136000936 + 3.75 Combine like terms: -2.136000936 + 3.75 = 1.613999064 m = 1.613999064 Simplifying m = 1.613999064

Solution

The solution to the problem is based on the solutions from the subproblems. m = {5.886000936, 1.613999064}

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