4m^2+18m=7

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Solution for 4m^2+18m=7 equation:


Simplifying
4m2 + 18m = 7

Reorder the terms:
18m + 4m2 = 7

Solving
18m + 4m2 = 7

Solving for variable 'm'.

Reorder the terms:
-7 + 18m + 4m2 = 7 + -7

Combine like terms: 7 + -7 = 0
-7 + 18m + 4m2 = 0

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

Divide each side by '4'.
-1.75 + 4.5m + m2 = 0

Move the constant term to the right:

Add '1.75' to each side of the equation.
-1.75 + 4.5m + 1.75 + m2 = 0 + 1.75

Reorder the terms:
-1.75 + 1.75 + 4.5m + m2 = 0 + 1.75

Combine like terms: -1.75 + 1.75 = 0.00
0.00 + 4.5m + m2 = 0 + 1.75
4.5m + m2 = 0 + 1.75

Combine like terms: 0 + 1.75 = 1.75
4.5m + m2 = 1.75

The m term is 4.5m.  Take half its coefficient (2.25).
Square it (5.0625) and add it to both sides.

Add '5.0625' to each side of the equation.
4.5m + 5.0625 + m2 = 1.75 + 5.0625

Reorder the terms:
5.0625 + 4.5m + m2 = 1.75 + 5.0625

Combine like terms: 1.75 + 5.0625 = 6.8125
5.0625 + 4.5m + m2 = 6.8125

Factor a perfect square on the left side:
(m + 2.25)(m + 2.25) = 6.8125

Calculate the square root of the right side: 2.610076627

Break this problem into two subproblems by setting 
(m + 2.25) equal to 2.610076627 and -2.610076627.

Subproblem 1

m + 2.25 = 2.610076627 Simplifying m + 2.25 = 2.610076627 Reorder the terms: 2.25 + m = 2.610076627 Solving 2.25 + m = 2.610076627 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-2.25' to each side of the equation. 2.25 + -2.25 + m = 2.610076627 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + m = 2.610076627 + -2.25 m = 2.610076627 + -2.25 Combine like terms: 2.610076627 + -2.25 = 0.360076627 m = 0.360076627 Simplifying m = 0.360076627

Subproblem 2

m + 2.25 = -2.610076627 Simplifying m + 2.25 = -2.610076627 Reorder the terms: 2.25 + m = -2.610076627 Solving 2.25 + m = -2.610076627 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-2.25' to each side of the equation. 2.25 + -2.25 + m = -2.610076627 + -2.25 Combine like terms: 2.25 + -2.25 = 0.00 0.00 + m = -2.610076627 + -2.25 m = -2.610076627 + -2.25 Combine like terms: -2.610076627 + -2.25 = -4.860076627 m = -4.860076627 Simplifying m = -4.860076627

Solution

The solution to the problem is based on the solutions from the subproblems. m = {0.360076627, -4.860076627}

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