3x(2x-33)+4(54-2x)=33

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Solution for 3x(2x-33)+4(54-2x)=33 equation:


Simplifying
3x(2x + -33) + 4(54 + -2x) = 33

Reorder the terms:
3x(-33 + 2x) + 4(54 + -2x) = 33
(-33 * 3x + 2x * 3x) + 4(54 + -2x) = 33
(-99x + 6x2) + 4(54 + -2x) = 33
-99x + 6x2 + (54 * 4 + -2x * 4) = 33
-99x + 6x2 + (216 + -8x) = 33

Reorder the terms:
216 + -99x + -8x + 6x2 = 33

Combine like terms: -99x + -8x = -107x
216 + -107x + 6x2 = 33

Solving
216 + -107x + 6x2 = 33

Solving for variable 'x'.

Reorder the terms:
216 + -33 + -107x + 6x2 = 33 + -33

Combine like terms: 216 + -33 = 183
183 + -107x + 6x2 = 33 + -33

Combine like terms: 33 + -33 = 0
183 + -107x + 6x2 = 0

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

Divide each side by '6'.
30.5 + -17.83333333x + x2 = 0

Move the constant term to the right:

Add '-30.5' to each side of the equation.
30.5 + -17.83333333x + -30.5 + x2 = 0 + -30.5

Reorder the terms:
30.5 + -30.5 + -17.83333333x + x2 = 0 + -30.5

Combine like terms: 30.5 + -30.5 = 0.0
0.0 + -17.83333333x + x2 = 0 + -30.5
-17.83333333x + x2 = 0 + -30.5

Combine like terms: 0 + -30.5 = -30.5
-17.83333333x + x2 = -30.5

The x term is -17.83333333x.  Take half its coefficient (-8.916666665).
Square it (79.50694441) and add it to both sides.

Add '79.50694441' to each side of the equation.
-17.83333333x + 79.50694441 + x2 = -30.5 + 79.50694441

Reorder the terms:
79.50694441 + -17.83333333x + x2 = -30.5 + 79.50694441

Combine like terms: -30.5 + 79.50694441 = 49.00694441
79.50694441 + -17.83333333x + x2 = 49.00694441

Factor a perfect square on the left side:
(x + -8.916666665)(x + -8.916666665) = 49.00694441

Calculate the square root of the right side: 7.000496012

Break this problem into two subproblems by setting 
(x + -8.916666665) equal to 7.000496012 and -7.000496012.

Subproblem 1

x + -8.916666665 = 7.000496012 Simplifying x + -8.916666665 = 7.000496012 Reorder the terms: -8.916666665 + x = 7.000496012 Solving -8.916666665 + x = 7.000496012 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.916666665' to each side of the equation. -8.916666665 + 8.916666665 + x = 7.000496012 + 8.916666665 Combine like terms: -8.916666665 + 8.916666665 = 0.000000000 0.000000000 + x = 7.000496012 + 8.916666665 x = 7.000496012 + 8.916666665 Combine like terms: 7.000496012 + 8.916666665 = 15.917162677 x = 15.917162677 Simplifying x = 15.917162677

Subproblem 2

x + -8.916666665 = -7.000496012 Simplifying x + -8.916666665 = -7.000496012 Reorder the terms: -8.916666665 + x = -7.000496012 Solving -8.916666665 + x = -7.000496012 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8.916666665' to each side of the equation. -8.916666665 + 8.916666665 + x = -7.000496012 + 8.916666665 Combine like terms: -8.916666665 + 8.916666665 = 0.000000000 0.000000000 + x = -7.000496012 + 8.916666665 x = -7.000496012 + 8.916666665 Combine like terms: -7.000496012 + 8.916666665 = 1.916170653 x = 1.916170653 Simplifying x = 1.916170653

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.917162677, 1.916170653}

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