5m^2-11m-18=

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Solution for 5m^2-11m-18= equation:


Simplifying
5m2 + -11m + -18 = 0

Reorder the terms:
-18 + -11m + 5m2 = 0

Solving
-18 + -11m + 5m2 = 0

Solving for variable 'm'.

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

Divide each side by '5'.
-3.6 + -2.2m + m2 = 0

Move the constant term to the right:

Add '3.6' to each side of the equation.
-3.6 + -2.2m + 3.6 + m2 = 0 + 3.6

Reorder the terms:
-3.6 + 3.6 + -2.2m + m2 = 0 + 3.6

Combine like terms: -3.6 + 3.6 = 0.0
0.0 + -2.2m + m2 = 0 + 3.6
-2.2m + m2 = 0 + 3.6

Combine like terms: 0 + 3.6 = 3.6
-2.2m + m2 = 3.6

The m term is -2.2m.  Take half its coefficient (-1.1).
Square it (1.21) and add it to both sides.

Add '1.21' to each side of the equation.
-2.2m + 1.21 + m2 = 3.6 + 1.21

Reorder the terms:
1.21 + -2.2m + m2 = 3.6 + 1.21

Combine like terms: 3.6 + 1.21 = 4.81
1.21 + -2.2m + m2 = 4.81

Factor a perfect square on the left side:
(m + -1.1)(m + -1.1) = 4.81

Calculate the square root of the right side: 2.19317122

Break this problem into two subproblems by setting 
(m + -1.1) equal to 2.19317122 and -2.19317122.

Subproblem 1

m + -1.1 = 2.19317122 Simplifying m + -1.1 = 2.19317122 Reorder the terms: -1.1 + m = 2.19317122 Solving -1.1 + m = 2.19317122 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '1.1' to each side of the equation. -1.1 + 1.1 + m = 2.19317122 + 1.1 Combine like terms: -1.1 + 1.1 = 0.0 0.0 + m = 2.19317122 + 1.1 m = 2.19317122 + 1.1 Combine like terms: 2.19317122 + 1.1 = 3.29317122 m = 3.29317122 Simplifying m = 3.29317122

Subproblem 2

m + -1.1 = -2.19317122 Simplifying m + -1.1 = -2.19317122 Reorder the terms: -1.1 + m = -2.19317122 Solving -1.1 + m = -2.19317122 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '1.1' to each side of the equation. -1.1 + 1.1 + m = -2.19317122 + 1.1 Combine like terms: -1.1 + 1.1 = 0.0 0.0 + m = -2.19317122 + 1.1 m = -2.19317122 + 1.1 Combine like terms: -2.19317122 + 1.1 = -1.09317122 m = -1.09317122 Simplifying m = -1.09317122

Solution

The solution to the problem is based on the solutions from the subproblems. m = {3.29317122, -1.09317122}

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