.25n+15=n^2

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Solution for .25n+15=n^2 equation:


Simplifying
0.25n + 15 = n2

Reorder the terms:
15 + 0.25n = n2

Solving
15 + 0.25n = n2

Solving for variable 'n'.

Combine like terms: n2 + -1n2 = 0
15 + 0.25n + -1n2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-15 + -0.25n + n2 = 0

Move the constant term to the right:

Add '15' to each side of the equation.
-15 + -0.25n + 15 + n2 = 0 + 15

Reorder the terms:
-15 + 15 + -0.25n + n2 = 0 + 15

Combine like terms: -15 + 15 = 0
0 + -0.25n + n2 = 0 + 15
-0.25n + n2 = 0 + 15

Combine like terms: 0 + 15 = 15
-0.25n + n2 = 15

The n term is -0.25n.  Take half its coefficient (-0.125).
Square it (0.015625) and add it to both sides.

Add '0.015625' to each side of the equation.
-0.25n + 0.015625 + n2 = 15 + 0.015625

Reorder the terms:
0.015625 + -0.25n + n2 = 15 + 0.015625

Combine like terms: 15 + 0.015625 = 15.015625
0.015625 + -0.25n + n2 = 15.015625

Factor a perfect square on the left side:
(n + -0.125)(n + -0.125) = 15.015625

Calculate the square root of the right side: 3.875

Break this problem into two subproblems by setting 
(n + -0.125) equal to 3.875 and -3.875.

Subproblem 1

n + -0.125 = 3.875 Simplifying n + -0.125 = 3.875 Reorder the terms: -0.125 + n = 3.875 Solving -0.125 + n = 3.875 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.125' to each side of the equation. -0.125 + 0.125 + n = 3.875 + 0.125 Combine like terms: -0.125 + 0.125 = 0.000 0.000 + n = 3.875 + 0.125 n = 3.875 + 0.125 Combine like terms: 3.875 + 0.125 = 4 n = 4 Simplifying n = 4

Subproblem 2

n + -0.125 = -3.875 Simplifying n + -0.125 = -3.875 Reorder the terms: -0.125 + n = -3.875 Solving -0.125 + n = -3.875 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.125' to each side of the equation. -0.125 + 0.125 + n = -3.875 + 0.125 Combine like terms: -0.125 + 0.125 = 0.000 0.000 + n = -3.875 + 0.125 n = -3.875 + 0.125 Combine like terms: -3.875 + 0.125 = -3.75 n = -3.75 Simplifying n = -3.75

Solution

The solution to the problem is based on the solutions from the subproblems. n = {4, -3.75}

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