3x^2+36x-4=0

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Solution for 3x^2+36x-4=0 equation:


Simplifying
3x2 + 36x + -4 = 0

Reorder the terms:
-4 + 36x + 3x2 = 0

Solving
-4 + 36x + 3x2 = 0

Solving for variable 'x'.

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

Divide each side by '3'.
-1.333333333 + 12x + x2 = 0

Move the constant term to the right:

Add '1.333333333' to each side of the equation.
-1.333333333 + 12x + 1.333333333 + x2 = 0 + 1.333333333

Reorder the terms:
-1.333333333 + 1.333333333 + 12x + x2 = 0 + 1.333333333

Combine like terms: -1.333333333 + 1.333333333 = 0.000000000
0.000000000 + 12x + x2 = 0 + 1.333333333
12x + x2 = 0 + 1.333333333

Combine like terms: 0 + 1.333333333 = 1.333333333
12x + x2 = 1.333333333

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 = 1.333333333 + 36

Reorder the terms:
36 + 12x + x2 = 1.333333333 + 36

Combine like terms: 1.333333333 + 36 = 37.333333333
36 + 12x + x2 = 37.333333333

Factor a perfect square on the left side:
(x + 6)(x + 6) = 37.333333333

Calculate the square root of the right side: 6.110100927

Break this problem into two subproblems by setting 
(x + 6) equal to 6.110100927 and -6.110100927.

Subproblem 1

x + 6 = 6.110100927 Simplifying x + 6 = 6.110100927 Reorder the terms: 6 + x = 6.110100927 Solving 6 + x = 6.110100927 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 = 6.110100927 + -6 Combine like terms: 6 + -6 = 0 0 + x = 6.110100927 + -6 x = 6.110100927 + -6 Combine like terms: 6.110100927 + -6 = 0.110100927 x = 0.110100927 Simplifying x = 0.110100927

Subproblem 2

x + 6 = -6.110100927 Simplifying x + 6 = -6.110100927 Reorder the terms: 6 + x = -6.110100927 Solving 6 + x = -6.110100927 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 = -6.110100927 + -6 Combine like terms: 6 + -6 = 0 0 + x = -6.110100927 + -6 x = -6.110100927 + -6 Combine like terms: -6.110100927 + -6 = -12.110100927 x = -12.110100927 Simplifying x = -12.110100927

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.110100927, -12.110100927}

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