3x^2-36x-15=0

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Solution for 3x^2-36x-15=0 equation:


Simplifying
3x2 + -36x + -15 = 0

Reorder the terms:
-15 + -36x + 3x2 = 0

Solving
-15 + -36x + 3x2 = 0

Solving for variable 'x'.

Factor out the Greatest Common Factor (GCF), '3'.
3(-5 + -12x + x2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-5 + -12x + x2)' equal to zero and attempt to solve: Simplifying -5 + -12x + x2 = 0 Solving -5 + -12x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '5' to each side of the equation. -5 + -12x + 5 + x2 = 0 + 5 Reorder the terms: -5 + 5 + -12x + x2 = 0 + 5 Combine like terms: -5 + 5 = 0 0 + -12x + x2 = 0 + 5 -12x + x2 = 0 + 5 Combine like terms: 0 + 5 = 5 -12x + x2 = 5 The x term is -12x. Take half its coefficient (-6). Square it (36) and add it to both sides. Add '36' to each side of the equation. -12x + 36 + x2 = 5 + 36 Reorder the terms: 36 + -12x + x2 = 5 + 36 Combine like terms: 5 + 36 = 41 36 + -12x + x2 = 41 Factor a perfect square on the left side: (x + -6)(x + -6) = 41 Calculate the square root of the right side: 6.403124237 Break this problem into two subproblems by setting (x + -6) equal to 6.403124237 and -6.403124237.

Subproblem 1

x + -6 = 6.403124237 Simplifying x + -6 = 6.403124237 Reorder the terms: -6 + x = 6.403124237 Solving -6 + x = 6.403124237 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = 6.403124237 + 6 Combine like terms: -6 + 6 = 0 0 + x = 6.403124237 + 6 x = 6.403124237 + 6 Combine like terms: 6.403124237 + 6 = 12.403124237 x = 12.403124237 Simplifying x = 12.403124237

Subproblem 2

x + -6 = -6.403124237 Simplifying x + -6 = -6.403124237 Reorder the terms: -6 + x = -6.403124237 Solving -6 + x = -6.403124237 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + x = -6.403124237 + 6 Combine like terms: -6 + 6 = 0 0 + x = -6.403124237 + 6 x = -6.403124237 + 6 Combine like terms: -6.403124237 + 6 = -0.403124237 x = -0.403124237 Simplifying x = -0.403124237

Solution

The solution to the problem is based on the solutions from the subproblems. x = {12.403124237, -0.403124237}

Solution

x = {12.403124237, -0.403124237}

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