5m+2m(m+1)=23

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Solution for 5m+2m(m+1)=23 equation:


Simplifying
5m + 2m(m + 1) = 23

Reorder the terms:
5m + 2m(1 + m) = 23
5m + (1 * 2m + m * 2m) = 23
5m + (2m + 2m2) = 23

Combine like terms: 5m + 2m = 7m
7m + 2m2 = 23

Solving
7m + 2m2 = 23

Solving for variable 'm'.

Reorder the terms:
-23 + 7m + 2m2 = 23 + -23

Combine like terms: 23 + -23 = 0
-23 + 7m + 2m2 = 0

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

Divide each side by '2'.
-11.5 + 3.5m + m2 = 0

Move the constant term to the right:

Add '11.5' to each side of the equation.
-11.5 + 3.5m + 11.5 + m2 = 0 + 11.5

Reorder the terms:
-11.5 + 11.5 + 3.5m + m2 = 0 + 11.5

Combine like terms: -11.5 + 11.5 = 0.0
0.0 + 3.5m + m2 = 0 + 11.5
3.5m + m2 = 0 + 11.5

Combine like terms: 0 + 11.5 = 11.5
3.5m + m2 = 11.5

The m term is 3.5m.  Take half its coefficient (1.75).
Square it (3.0625) and add it to both sides.

Add '3.0625' to each side of the equation.
3.5m + 3.0625 + m2 = 11.5 + 3.0625

Reorder the terms:
3.0625 + 3.5m + m2 = 11.5 + 3.0625

Combine like terms: 11.5 + 3.0625 = 14.5625
3.0625 + 3.5m + m2 = 14.5625

Factor a perfect square on the left side:
(m + 1.75)(m + 1.75) = 14.5625

Calculate the square root of the right side: 3.816084381

Break this problem into two subproblems by setting 
(m + 1.75) equal to 3.816084381 and -3.816084381.

Subproblem 1

m + 1.75 = 3.816084381 Simplifying m + 1.75 = 3.816084381 Reorder the terms: 1.75 + m = 3.816084381 Solving 1.75 + m = 3.816084381 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + m = 3.816084381 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + m = 3.816084381 + -1.75 m = 3.816084381 + -1.75 Combine like terms: 3.816084381 + -1.75 = 2.066084381 m = 2.066084381 Simplifying m = 2.066084381

Subproblem 2

m + 1.75 = -3.816084381 Simplifying m + 1.75 = -3.816084381 Reorder the terms: 1.75 + m = -3.816084381 Solving 1.75 + m = -3.816084381 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-1.75' to each side of the equation. 1.75 + -1.75 + m = -3.816084381 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + m = -3.816084381 + -1.75 m = -3.816084381 + -1.75 Combine like terms: -3.816084381 + -1.75 = -5.566084381 m = -5.566084381 Simplifying m = -5.566084381

Solution

The solution to the problem is based on the solutions from the subproblems. m = {2.066084381, -5.566084381}

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