5m^2+17m-66=0

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Solution for 5m^2+17m-66=0 equation:


Simplifying
5m2 + 17m + -66 = 0

Reorder the terms:
-66 + 17m + 5m2 = 0

Solving
-66 + 17m + 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'.
-13.2 + 3.4m + m2 = 0

Move the constant term to the right:

Add '13.2' to each side of the equation.
-13.2 + 3.4m + 13.2 + m2 = 0 + 13.2

Reorder the terms:
-13.2 + 13.2 + 3.4m + m2 = 0 + 13.2

Combine like terms: -13.2 + 13.2 = 0.0
0.0 + 3.4m + m2 = 0 + 13.2
3.4m + m2 = 0 + 13.2

Combine like terms: 0 + 13.2 = 13.2
3.4m + m2 = 13.2

The m term is 3.4m.  Take half its coefficient (1.7).
Square it (2.89) and add it to both sides.

Add '2.89' to each side of the equation.
3.4m + 2.89 + m2 = 13.2 + 2.89

Reorder the terms:
2.89 + 3.4m + m2 = 13.2 + 2.89

Combine like terms: 13.2 + 2.89 = 16.09
2.89 + 3.4m + m2 = 16.09

Factor a perfect square on the left side:
(m + 1.7)(m + 1.7) = 16.09

Calculate the square root of the right side: 4.011234224

Break this problem into two subproblems by setting 
(m + 1.7) equal to 4.011234224 and -4.011234224.

Subproblem 1

m + 1.7 = 4.011234224 Simplifying m + 1.7 = 4.011234224 Reorder the terms: 1.7 + m = 4.011234224 Solving 1.7 + m = 4.011234224 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-1.7' to each side of the equation. 1.7 + -1.7 + m = 4.011234224 + -1.7 Combine like terms: 1.7 + -1.7 = 0.0 0.0 + m = 4.011234224 + -1.7 m = 4.011234224 + -1.7 Combine like terms: 4.011234224 + -1.7 = 2.311234224 m = 2.311234224 Simplifying m = 2.311234224

Subproblem 2

m + 1.7 = -4.011234224 Simplifying m + 1.7 = -4.011234224 Reorder the terms: 1.7 + m = -4.011234224 Solving 1.7 + m = -4.011234224 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-1.7' to each side of the equation. 1.7 + -1.7 + m = -4.011234224 + -1.7 Combine like terms: 1.7 + -1.7 = 0.0 0.0 + m = -4.011234224 + -1.7 m = -4.011234224 + -1.7 Combine like terms: -4.011234224 + -1.7 = -5.711234224 m = -5.711234224 Simplifying m = -5.711234224

Solution

The solution to the problem is based on the solutions from the subproblems. m = {2.311234224, -5.711234224}

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