5n^2-6n-25=0

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Solution for 5n^2-6n-25=0 equation:


Simplifying
5n2 + -6n + -25 = 0

Reorder the terms:
-25 + -6n + 5n2 = 0

Solving
-25 + -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'.
-5 + -1.2n + n2 = 0

Move the constant term to the right:

Add '5' to each side of the equation.
-5 + -1.2n + 5 + n2 = 0 + 5

Reorder the terms:
-5 + 5 + -1.2n + n2 = 0 + 5

Combine like terms: -5 + 5 = 0
0 + -1.2n + n2 = 0 + 5
-1.2n + n2 = 0 + 5

Combine like terms: 0 + 5 = 5
-1.2n + n2 = 5

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 = 5 + 0.36

Reorder the terms:
0.36 + -1.2n + n2 = 5 + 0.36

Combine like terms: 5 + 0.36 = 5.36
0.36 + -1.2n + n2 = 5.36

Factor a perfect square on the left side:
(n + -0.6)(n + -0.6) = 5.36

Calculate the square root of the right side: 2.315167381

Break this problem into two subproblems by setting 
(n + -0.6) equal to 2.315167381 and -2.315167381.

Subproblem 1

n + -0.6 = 2.315167381 Simplifying n + -0.6 = 2.315167381 Reorder the terms: -0.6 + n = 2.315167381 Solving -0.6 + n = 2.315167381 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 = 2.315167381 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + n = 2.315167381 + 0.6 n = 2.315167381 + 0.6 Combine like terms: 2.315167381 + 0.6 = 2.915167381 n = 2.915167381 Simplifying n = 2.915167381

Subproblem 2

n + -0.6 = -2.315167381 Simplifying n + -0.6 = -2.315167381 Reorder the terms: -0.6 + n = -2.315167381 Solving -0.6 + n = -2.315167381 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 = -2.315167381 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + n = -2.315167381 + 0.6 n = -2.315167381 + 0.6 Combine like terms: -2.315167381 + 0.6 = -1.715167381 n = -1.715167381 Simplifying n = -1.715167381

Solution

The solution to the problem is based on the solutions from the subproblems. n = {2.915167381, -1.715167381}

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