5n^2+12n-5=0

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Solution for 5n^2+12n-5=0 equation:


Simplifying
5n2 + 12n + -5 = 0

Reorder the terms:
-5 + 12n + 5n2 = 0

Solving
-5 + 12n + 5n2 = 0

Solving for variable 'n'.

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

Divide each side by '5'.
-1 + 2.4n + n2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + 2.4n + 1 + n2 = 0 + 1

Reorder the terms:
-1 + 1 + 2.4n + n2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 2.4n + n2 = 0 + 1
2.4n + n2 = 0 + 1

Combine like terms: 0 + 1 = 1
2.4n + n2 = 1

The n term is 2.4n.  Take half its coefficient (1.2).
Square it (1.44) and add it to both sides.

Add '1.44' to each side of the equation.
2.4n + 1.44 + n2 = 1 + 1.44

Reorder the terms:
1.44 + 2.4n + n2 = 1 + 1.44

Combine like terms: 1 + 1.44 = 2.44
1.44 + 2.4n + n2 = 2.44

Factor a perfect square on the left side:
(n + 1.2)(n + 1.2) = 2.44

Calculate the square root of the right side: 1.562049935

Break this problem into two subproblems by setting 
(n + 1.2) equal to 1.562049935 and -1.562049935.

Subproblem 1

n + 1.2 = 1.562049935 Simplifying n + 1.2 = 1.562049935 Reorder the terms: 1.2 + n = 1.562049935 Solving 1.2 + n = 1.562049935 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1.2' to each side of the equation. 1.2 + -1.2 + n = 1.562049935 + -1.2 Combine like terms: 1.2 + -1.2 = 0.0 0.0 + n = 1.562049935 + -1.2 n = 1.562049935 + -1.2 Combine like terms: 1.562049935 + -1.2 = 0.362049935 n = 0.362049935 Simplifying n = 0.362049935

Subproblem 2

n + 1.2 = -1.562049935 Simplifying n + 1.2 = -1.562049935 Reorder the terms: 1.2 + n = -1.562049935 Solving 1.2 + n = -1.562049935 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1.2' to each side of the equation. 1.2 + -1.2 + n = -1.562049935 + -1.2 Combine like terms: 1.2 + -1.2 = 0.0 0.0 + n = -1.562049935 + -1.2 n = -1.562049935 + -1.2 Combine like terms: -1.562049935 + -1.2 = -2.762049935 n = -2.762049935 Simplifying n = -2.762049935

Solution

The solution to the problem is based on the solutions from the subproblems. n = {0.362049935, -2.762049935}

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