3n(12n+3)-15=396

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Solution for 3n(12n+3)-15=396 equation:


Simplifying
3n(12n + 3) + -15 = 396

Reorder the terms:
3n(3 + 12n) + -15 = 396
(3 * 3n + 12n * 3n) + -15 = 396
(9n + 36n2) + -15 = 396

Reorder the terms:
-15 + 9n + 36n2 = 396

Solving
-15 + 9n + 36n2 = 396

Solving for variable 'n'.

Reorder the terms:
-15 + -396 + 9n + 36n2 = 396 + -396

Combine like terms: -15 + -396 = -411
-411 + 9n + 36n2 = 396 + -396

Combine like terms: 396 + -396 = 0
-411 + 9n + 36n2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-137 + 3n + 12n2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-137 + 3n + 12n2)' equal to zero and attempt to solve: Simplifying -137 + 3n + 12n2 = 0 Solving -137 + 3n + 12n2 = 0 Begin completing the square. Divide all terms by 12 the coefficient of the squared term: Divide each side by '12'. -11.41666667 + 0.25n + n2 = 0 Move the constant term to the right: Add '11.41666667' to each side of the equation. -11.41666667 + 0.25n + 11.41666667 + n2 = 0 + 11.41666667 Reorder the terms: -11.41666667 + 11.41666667 + 0.25n + n2 = 0 + 11.41666667 Combine like terms: -11.41666667 + 11.41666667 = 0.00000000 0.00000000 + 0.25n + n2 = 0 + 11.41666667 0.25n + n2 = 0 + 11.41666667 Combine like terms: 0 + 11.41666667 = 11.41666667 0.25n + n2 = 11.41666667 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 = 11.41666667 + 0.015625 Reorder the terms: 0.015625 + 0.25n + n2 = 11.41666667 + 0.015625 Combine like terms: 11.41666667 + 0.015625 = 11.43229167 0.015625 + 0.25n + n2 = 11.43229167 Factor a perfect square on the left side: (n + 0.125)(n + 0.125) = 11.43229167 Calculate the square root of the right side: 3.381167205 Break this problem into two subproblems by setting (n + 0.125) equal to 3.381167205 and -3.381167205.

Subproblem 1

n + 0.125 = 3.381167205 Simplifying n + 0.125 = 3.381167205 Reorder the terms: 0.125 + n = 3.381167205 Solving 0.125 + n = 3.381167205 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 = 3.381167205 + -0.125 Combine like terms: 0.125 + -0.125 = 0.000 0.000 + n = 3.381167205 + -0.125 n = 3.381167205 + -0.125 Combine like terms: 3.381167205 + -0.125 = 3.256167205 n = 3.256167205 Simplifying n = 3.256167205

Subproblem 2

n + 0.125 = -3.381167205 Simplifying n + 0.125 = -3.381167205 Reorder the terms: 0.125 + n = -3.381167205 Solving 0.125 + n = -3.381167205 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 = -3.381167205 + -0.125 Combine like terms: 0.125 + -0.125 = 0.000 0.000 + n = -3.381167205 + -0.125 n = -3.381167205 + -0.125 Combine like terms: -3.381167205 + -0.125 = -3.506167205 n = -3.506167205 Simplifying n = -3.506167205

Solution

The solution to the problem is based on the solutions from the subproblems. n = {3.256167205, -3.506167205}

Solution

n = {3.256167205, -3.506167205}

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