-15n^2+13=-10n^2-6n

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Solution for -15n^2+13=-10n^2-6n equation:


Simplifying
-15n2 + 13 = -10n2 + -6n

Reorder the terms:
13 + -15n2 = -10n2 + -6n

Reorder the terms:
13 + -15n2 = -6n + -10n2

Solving
13 + -15n2 = -6n + -10n2

Solving for variable 'n'.

Reorder the terms:
13 + 6n + -15n2 + 10n2 = -6n + -10n2 + 6n + 10n2

Combine like terms: -15n2 + 10n2 = -5n2
13 + 6n + -5n2 = -6n + -10n2 + 6n + 10n2

Reorder the terms:
13 + 6n + -5n2 = -6n + 6n + -10n2 + 10n2

Combine like terms: -6n + 6n = 0
13 + 6n + -5n2 = 0 + -10n2 + 10n2
13 + 6n + -5n2 = -10n2 + 10n2

Combine like terms: -10n2 + 10n2 = 0
13 + 6n + -5n2 = 0

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

Divide each side by '-5'.
-2.6 + -1.2n + n2 = 0

Move the constant term to the right:

Add '2.6' to each side of the equation.
-2.6 + -1.2n + 2.6 + n2 = 0 + 2.6

Reorder the terms:
-2.6 + 2.6 + -1.2n + n2 = 0 + 2.6

Combine like terms: -2.6 + 2.6 = 0.0
0.0 + -1.2n + n2 = 0 + 2.6
-1.2n + n2 = 0 + 2.6

Combine like terms: 0 + 2.6 = 2.6
-1.2n + n2 = 2.6

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 = 2.6 + 0.36

Reorder the terms:
0.36 + -1.2n + n2 = 2.6 + 0.36

Combine like terms: 2.6 + 0.36 = 2.96
0.36 + -1.2n + n2 = 2.96

Factor a perfect square on the left side:
(n + -0.6)(n + -0.6) = 2.96

Calculate the square root of the right side: 1.720465053

Break this problem into two subproblems by setting 
(n + -0.6) equal to 1.720465053 and -1.720465053.

Subproblem 1

n + -0.6 = 1.720465053 Simplifying n + -0.6 = 1.720465053 Reorder the terms: -0.6 + n = 1.720465053 Solving -0.6 + n = 1.720465053 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 = 1.720465053 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + n = 1.720465053 + 0.6 n = 1.720465053 + 0.6 Combine like terms: 1.720465053 + 0.6 = 2.320465053 n = 2.320465053 Simplifying n = 2.320465053

Subproblem 2

n + -0.6 = -1.720465053 Simplifying n + -0.6 = -1.720465053 Reorder the terms: -0.6 + n = -1.720465053 Solving -0.6 + n = -1.720465053 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 = -1.720465053 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + n = -1.720465053 + 0.6 n = -1.720465053 + 0.6 Combine like terms: -1.720465053 + 0.6 = -1.120465053 n = -1.120465053 Simplifying n = -1.120465053

Solution

The solution to the problem is based on the solutions from the subproblems. n = {2.320465053, -1.120465053}

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