-4n(2n-6)-1n=-9

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Solution for -4n(2n-6)-1n=-9 equation:


Simplifying
-4n(2n + -6) + -1n = -9

Reorder the terms:
-4n(-6 + 2n) + -1n = -9
(-6 * -4n + 2n * -4n) + -1n = -9
(24n + -8n2) + -1n = -9

Reorder the terms:
24n + -1n + -8n2 = -9

Combine like terms: 24n + -1n = 23n
23n + -8n2 = -9

Solving
23n + -8n2 = -9

Solving for variable 'n'.

Reorder the terms:
9 + 23n + -8n2 = -9 + 9

Combine like terms: -9 + 9 = 0
9 + 23n + -8n2 = 0

Begin completing the square.  Divide all terms by
-8 the coefficient of the squared term: 

Divide each side by '-8'.
-1.125 + -2.875n + n2 = 0

Move the constant term to the right:

Add '1.125' to each side of the equation.
-1.125 + -2.875n + 1.125 + n2 = 0 + 1.125

Reorder the terms:
-1.125 + 1.125 + -2.875n + n2 = 0 + 1.125

Combine like terms: -1.125 + 1.125 = 0.000
0.000 + -2.875n + n2 = 0 + 1.125
-2.875n + n2 = 0 + 1.125

Combine like terms: 0 + 1.125 = 1.125
-2.875n + n2 = 1.125

The n term is -2.875n.  Take half its coefficient (-1.4375).
Square it (2.06640625) and add it to both sides.

Add '2.06640625' to each side of the equation.
-2.875n + 2.06640625 + n2 = 1.125 + 2.06640625

Reorder the terms:
2.06640625 + -2.875n + n2 = 1.125 + 2.06640625

Combine like terms: 1.125 + 2.06640625 = 3.19140625
2.06640625 + -2.875n + n2 = 3.19140625

Factor a perfect square on the left side:
(n + -1.4375)(n + -1.4375) = 3.19140625

Calculate the square root of the right side: 1.786450741

Break this problem into two subproblems by setting 
(n + -1.4375) equal to 1.786450741 and -1.786450741.

Subproblem 1

n + -1.4375 = 1.786450741 Simplifying n + -1.4375 = 1.786450741 Reorder the terms: -1.4375 + n = 1.786450741 Solving -1.4375 + n = 1.786450741 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '1.4375' to each side of the equation. -1.4375 + 1.4375 + n = 1.786450741 + 1.4375 Combine like terms: -1.4375 + 1.4375 = 0.0000 0.0000 + n = 1.786450741 + 1.4375 n = 1.786450741 + 1.4375 Combine like terms: 1.786450741 + 1.4375 = 3.223950741 n = 3.223950741 Simplifying n = 3.223950741

Subproblem 2

n + -1.4375 = -1.786450741 Simplifying n + -1.4375 = -1.786450741 Reorder the terms: -1.4375 + n = -1.786450741 Solving -1.4375 + n = -1.786450741 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '1.4375' to each side of the equation. -1.4375 + 1.4375 + n = -1.786450741 + 1.4375 Combine like terms: -1.4375 + 1.4375 = 0.0000 0.0000 + n = -1.786450741 + 1.4375 n = -1.786450741 + 1.4375 Combine like terms: -1.786450741 + 1.4375 = -0.348950741 n = -0.348950741 Simplifying n = -0.348950741

Solution

The solution to the problem is based on the solutions from the subproblems. n = {3.223950741, -0.348950741}

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