-6x^2+3x^2+72x-5=0

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Solution for -6x^2+3x^2+72x-5=0 equation:


Simplifying
-6x2 + 3x2 + 72x + -5 = 0

Reorder the terms:
-5 + 72x + -6x2 + 3x2 = 0

Combine like terms: -6x2 + 3x2 = -3x2
-5 + 72x + -3x2 = 0

Solving
-5 + 72x + -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'.
1.666666667 + -24x + x2 = 0

Move the constant term to the right:

Add '-1.666666667' to each side of the equation.
1.666666667 + -24x + -1.666666667 + x2 = 0 + -1.666666667

Reorder the terms:
1.666666667 + -1.666666667 + -24x + x2 = 0 + -1.666666667

Combine like terms: 1.666666667 + -1.666666667 = 0.000000000
0.000000000 + -24x + x2 = 0 + -1.666666667
-24x + x2 = 0 + -1.666666667

Combine like terms: 0 + -1.666666667 = -1.666666667
-24x + x2 = -1.666666667

The x term is -24x.  Take half its coefficient (-12).
Square it (144) and add it to both sides.

Add '144' to each side of the equation.
-24x + 144 + x2 = -1.666666667 + 144

Reorder the terms:
144 + -24x + x2 = -1.666666667 + 144

Combine like terms: -1.666666667 + 144 = 142.333333333
144 + -24x + x2 = 142.333333333

Factor a perfect square on the left side:
(x + -12)(x + -12) = 142.333333333

Calculate the square root of the right side: 11.930353445

Break this problem into two subproblems by setting 
(x + -12) equal to 11.930353445 and -11.930353445.

Subproblem 1

x + -12 = 11.930353445 Simplifying x + -12 = 11.930353445 Reorder the terms: -12 + x = 11.930353445 Solving -12 + x = 11.930353445 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + x = 11.930353445 + 12 Combine like terms: -12 + 12 = 0 0 + x = 11.930353445 + 12 x = 11.930353445 + 12 Combine like terms: 11.930353445 + 12 = 23.930353445 x = 23.930353445 Simplifying x = 23.930353445

Subproblem 2

x + -12 = -11.930353445 Simplifying x + -12 = -11.930353445 Reorder the terms: -12 + x = -11.930353445 Solving -12 + x = -11.930353445 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + x = -11.930353445 + 12 Combine like terms: -12 + 12 = 0 0 + x = -11.930353445 + 12 x = -11.930353445 + 12 Combine like terms: -11.930353445 + 12 = 0.069646555 x = 0.069646555 Simplifying x = 0.069646555

Solution

The solution to the problem is based on the solutions from the subproblems. x = {23.930353445, 0.069646555}

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