5n^2-6n-10=0

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Solution for 5n^2-6n-10=0 equation:


Simplifying
5n2 + -6n + -10 = 0

Reorder the terms:
-10 + -6n + 5n2 = 0

Solving
-10 + -6n + 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'.
-2 + -1.2n + n2 = 0

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + -1.2n + 2 + n2 = 0 + 2

Reorder the terms:
-2 + 2 + -1.2n + n2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -1.2n + n2 = 0 + 2
-1.2n + n2 = 0 + 2

Combine like terms: 0 + 2 = 2
-1.2n + n2 = 2

The n term is -1.2n.  Take half its coefficient (-0.6).
Square it (0.36) and add it to both sides.

Add '0.36' to each side of the equation.
-1.2n + 0.36 + n2 = 2 + 0.36

Reorder the terms:
0.36 + -1.2n + n2 = 2 + 0.36

Combine like terms: 2 + 0.36 = 2.36
0.36 + -1.2n + n2 = 2.36

Factor a perfect square on the left side:
(n + -0.6)(n + -0.6) = 2.36

Calculate the square root of the right side: 1.53622915

Break this problem into two subproblems by setting 
(n + -0.6) equal to 1.53622915 and -1.53622915.

Subproblem 1

n + -0.6 = 1.53622915 Simplifying n + -0.6 = 1.53622915 Reorder the terms: -0.6 + n = 1.53622915 Solving -0.6 + n = 1.53622915 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.6' to each side of the equation. -0.6 + 0.6 + n = 1.53622915 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + n = 1.53622915 + 0.6 n = 1.53622915 + 0.6 Combine like terms: 1.53622915 + 0.6 = 2.13622915 n = 2.13622915 Simplifying n = 2.13622915

Subproblem 2

n + -0.6 = -1.53622915 Simplifying n + -0.6 = -1.53622915 Reorder the terms: -0.6 + n = -1.53622915 Solving -0.6 + n = -1.53622915 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.6' to each side of the equation. -0.6 + 0.6 + n = -1.53622915 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + n = -1.53622915 + 0.6 n = -1.53622915 + 0.6 Combine like terms: -1.53622915 + 0.6 = -0.93622915 n = -0.93622915 Simplifying n = -0.93622915

Solution

The solution to the problem is based on the solutions from the subproblems. n = {2.13622915, -0.93622915}

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