2m^2+7m-18=0

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Solution for 2m^2+7m-18=0 equation:


Simplifying
2m2 + 7m + -18 = 0

Reorder the terms:
-18 + 7m + 2m2 = 0

Solving
-18 + 7m + 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'.
-9 + 3.5m + m2 = 0

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + 3.5m + 9 + m2 = 0 + 9

Reorder the terms:
-9 + 9 + 3.5m + m2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 3.5m + m2 = 0 + 9
3.5m + m2 = 0 + 9

Combine like terms: 0 + 9 = 9
3.5m + m2 = 9

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 = 9 + 3.0625

Reorder the terms:
3.0625 + 3.5m + m2 = 9 + 3.0625

Combine like terms: 9 + 3.0625 = 12.0625
3.0625 + 3.5m + m2 = 12.0625

Factor a perfect square on the left side:
(m + 1.75)(m + 1.75) = 12.0625

Calculate the square root of the right side: 3.473110997

Break this problem into two subproblems by setting 
(m + 1.75) equal to 3.473110997 and -3.473110997.

Subproblem 1

m + 1.75 = 3.473110997 Simplifying m + 1.75 = 3.473110997 Reorder the terms: 1.75 + m = 3.473110997 Solving 1.75 + m = 3.473110997 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 = 3.473110997 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + m = 3.473110997 + -1.75 m = 3.473110997 + -1.75 Combine like terms: 3.473110997 + -1.75 = 1.723110997 m = 1.723110997 Simplifying m = 1.723110997

Subproblem 2

m + 1.75 = -3.473110997 Simplifying m + 1.75 = -3.473110997 Reorder the terms: 1.75 + m = -3.473110997 Solving 1.75 + m = -3.473110997 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 = -3.473110997 + -1.75 Combine like terms: 1.75 + -1.75 = 0.00 0.00 + m = -3.473110997 + -1.75 m = -3.473110997 + -1.75 Combine like terms: -3.473110997 + -1.75 = -5.223110997 m = -5.223110997 Simplifying m = -5.223110997

Solution

The solution to the problem is based on the solutions from the subproblems. m = {1.723110997, -5.223110997}

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