-2n^2=-15n-22

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Solution for -2n^2=-15n-22 equation:


Simplifying
-2n2 = -15n + -22

Reorder the terms:
-2n2 = -22 + -15n

Solving
-2n2 = -22 + -15n

Solving for variable 'n'.

Reorder the terms:
22 + 15n + -2n2 = -22 + -15n + 22 + 15n

Reorder the terms:
22 + 15n + -2n2 = -22 + 22 + -15n + 15n

Combine like terms: -22 + 22 = 0
22 + 15n + -2n2 = 0 + -15n + 15n
22 + 15n + -2n2 = -15n + 15n

Combine like terms: -15n + 15n = 0
22 + 15n + -2n2 = 0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
-11 + -7.5n + n2 = 0

Move the constant term to the right:

Add '11' to each side of the equation.
-11 + -7.5n + 11 + n2 = 0 + 11

Reorder the terms:
-11 + 11 + -7.5n + n2 = 0 + 11

Combine like terms: -11 + 11 = 0
0 + -7.5n + n2 = 0 + 11
-7.5n + n2 = 0 + 11

Combine like terms: 0 + 11 = 11
-7.5n + n2 = 11

The n term is -7.5n.  Take half its coefficient (-3.75).
Square it (14.0625) and add it to both sides.

Add '14.0625' to each side of the equation.
-7.5n + 14.0625 + n2 = 11 + 14.0625

Reorder the terms:
14.0625 + -7.5n + n2 = 11 + 14.0625

Combine like terms: 11 + 14.0625 = 25.0625
14.0625 + -7.5n + n2 = 25.0625

Factor a perfect square on the left side:
(n + -3.75)(n + -3.75) = 25.0625

Calculate the square root of the right side: 5.006246099

Break this problem into two subproblems by setting 
(n + -3.75) equal to 5.006246099 and -5.006246099.

Subproblem 1

n + -3.75 = 5.006246099 Simplifying n + -3.75 = 5.006246099 Reorder the terms: -3.75 + n = 5.006246099 Solving -3.75 + n = 5.006246099 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '3.75' to each side of the equation. -3.75 + 3.75 + n = 5.006246099 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + n = 5.006246099 + 3.75 n = 5.006246099 + 3.75 Combine like terms: 5.006246099 + 3.75 = 8.756246099 n = 8.756246099 Simplifying n = 8.756246099

Subproblem 2

n + -3.75 = -5.006246099 Simplifying n + -3.75 = -5.006246099 Reorder the terms: -3.75 + n = -5.006246099 Solving -3.75 + n = -5.006246099 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '3.75' to each side of the equation. -3.75 + 3.75 + n = -5.006246099 + 3.75 Combine like terms: -3.75 + 3.75 = 0.00 0.00 + n = -5.006246099 + 3.75 n = -5.006246099 + 3.75 Combine like terms: -5.006246099 + 3.75 = -1.256246099 n = -1.256246099 Simplifying n = -1.256246099

Solution

The solution to the problem is based on the solutions from the subproblems. n = {8.756246099, -1.256246099}

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