X=3X(180-X)+8

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Solution for X=3X(180-X)+8 equation:


Simplifying
X = 3X(180 + -1X) + 8
X = (180 * 3X + -1X * 3X) + 8
X = (540X + -3X2) + 8

Reorder the terms:
X = 8 + 540X + -3X2

Solving
X = 8 + 540X + -3X2

Solving for variable 'X'.

Reorder the terms:
-8 + X + -540X + 3X2 = 8 + 540X + -3X2 + -8 + -540X + 3X2

Combine like terms: X + -540X = -539X
-8 + -539X + 3X2 = 8 + 540X + -3X2 + -8 + -540X + 3X2

Reorder the terms:
-8 + -539X + 3X2 = 8 + -8 + 540X + -540X + -3X2 + 3X2

Combine like terms: 8 + -8 = 0
-8 + -539X + 3X2 = 0 + 540X + -540X + -3X2 + 3X2
-8 + -539X + 3X2 = 540X + -540X + -3X2 + 3X2

Combine like terms: 540X + -540X = 0
-8 + -539X + 3X2 = 0 + -3X2 + 3X2
-8 + -539X + 3X2 = -3X2 + 3X2

Combine like terms: -3X2 + 3X2 = 0
-8 + -539X + 3X2 = 0

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

Divide each side by '3'.
-2.666666667 + -179.6666667X + X2 = 0

Move the constant term to the right:

Add '2.666666667' to each side of the equation.
-2.666666667 + -179.6666667X + 2.666666667 + X2 = 0 + 2.666666667

Reorder the terms:
-2.666666667 + 2.666666667 + -179.6666667X + X2 = 0 + 2.666666667

Combine like terms: -2.666666667 + 2.666666667 = 0.000000000
0.000000000 + -179.6666667X + X2 = 0 + 2.666666667
-179.6666667X + X2 = 0 + 2.666666667

Combine like terms: 0 + 2.666666667 = 2.666666667
-179.6666667X + X2 = 2.666666667

The X term is -179.6666667X.  Take half its coefficient (-89.83333335).
Square it (8070.027781) and add it to both sides.

Add '8070.027781' to each side of the equation.
-179.6666667X + 8070.027781 + X2 = 2.666666667 + 8070.027781

Reorder the terms:
8070.027781 + -179.6666667X + X2 = 2.666666667 + 8070.027781

Combine like terms: 2.666666667 + 8070.027781 = 8072.694447667
8070.027781 + -179.6666667X + X2 = 8072.694447667

Factor a perfect square on the left side:
(X + -89.83333335)(X + -89.83333335) = 8072.694447667

Calculate the square root of the right side: 89.848174426

Break this problem into two subproblems by setting 
(X + -89.83333335) equal to 89.848174426 and -89.848174426.

Subproblem 1

X + -89.83333335 = 89.848174426 Simplifying X + -89.83333335 = 89.848174426 Reorder the terms: -89.83333335 + X = 89.848174426 Solving -89.83333335 + X = 89.848174426 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '89.83333335' to each side of the equation. -89.83333335 + 89.83333335 + X = 89.848174426 + 89.83333335 Combine like terms: -89.83333335 + 89.83333335 = 0.00000000 0.00000000 + X = 89.848174426 + 89.83333335 X = 89.848174426 + 89.83333335 Combine like terms: 89.848174426 + 89.83333335 = 179.681507776 X = 179.681507776 Simplifying X = 179.681507776

Subproblem 2

X + -89.83333335 = -89.848174426 Simplifying X + -89.83333335 = -89.848174426 Reorder the terms: -89.83333335 + X = -89.848174426 Solving -89.83333335 + X = -89.848174426 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '89.83333335' to each side of the equation. -89.83333335 + 89.83333335 + X = -89.848174426 + 89.83333335 Combine like terms: -89.83333335 + 89.83333335 = 0.00000000 0.00000000 + X = -89.848174426 + 89.83333335 X = -89.848174426 + 89.83333335 Combine like terms: -89.848174426 + 89.83333335 = -0.014841076 X = -0.014841076 Simplifying X = -0.014841076

Solution

The solution to the problem is based on the solutions from the subproblems. X = {179.681507776, -0.014841076}

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