-5x+(3x)(3x)-3x+100-125=0

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Solution for -5x+(3x)(3x)-3x+100-125=0 equation:


Simplifying
-5x + (3x)(3x) + -3x + 100 + -125 = 0

Remove parenthesis around (3x)
-5x + 3x(3x) + -3x + 100 + -125 = 0

Remove parenthesis around (3x)
-5x + 3x * 3x + -3x + 100 + -125 = 0

Reorder the terms for easier multiplication:
-5x + 3 * 3x * x + -3x + 100 + -125 = 0

Multiply 3 * 3
-5x + 9x * x + -3x + 100 + -125 = 0

Multiply x * x
-5x + 9x2 + -3x + 100 + -125 = 0

Reorder the terms:
100 + -125 + -5x + -3x + 9x2 = 0

Combine like terms: 100 + -125 = -25
-25 + -5x + -3x + 9x2 = 0

Combine like terms: -5x + -3x = -8x
-25 + -8x + 9x2 = 0

Solving
-25 + -8x + 9x2 = 0

Solving for variable 'x'.

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

Divide each side by '9'.
-2.777777778 + -0.8888888889x + x2 = 0

Move the constant term to the right:

Add '2.777777778' to each side of the equation.
-2.777777778 + -0.8888888889x + 2.777777778 + x2 = 0 + 2.777777778

Reorder the terms:
-2.777777778 + 2.777777778 + -0.8888888889x + x2 = 0 + 2.777777778

Combine like terms: -2.777777778 + 2.777777778 = 0.000000000
0.000000000 + -0.8888888889x + x2 = 0 + 2.777777778
-0.8888888889x + x2 = 0 + 2.777777778

Combine like terms: 0 + 2.777777778 = 2.777777778
-0.8888888889x + x2 = 2.777777778

The x term is -0.8888888889x.  Take half its coefficient (-0.4444444445).
Square it (0.1975308642) and add it to both sides.

Add '0.1975308642' to each side of the equation.
-0.8888888889x + 0.1975308642 + x2 = 2.777777778 + 0.1975308642

Reorder the terms:
0.1975308642 + -0.8888888889x + x2 = 2.777777778 + 0.1975308642

Combine like terms: 2.777777778 + 0.1975308642 = 2.9753086422
0.1975308642 + -0.8888888889x + x2 = 2.9753086422

Factor a perfect square on the left side:
(x + -0.4444444445)(x + -0.4444444445) = 2.9753086422

Calculate the square root of the right side: 1.7249083

Break this problem into two subproblems by setting 
(x + -0.4444444445) equal to 1.7249083 and -1.7249083.

Subproblem 1

x + -0.4444444445 = 1.7249083 Simplifying x + -0.4444444445 = 1.7249083 Reorder the terms: -0.4444444445 + x = 1.7249083 Solving -0.4444444445 + x = 1.7249083 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4444444445' to each side of the equation. -0.4444444445 + 0.4444444445 + x = 1.7249083 + 0.4444444445 Combine like terms: -0.4444444445 + 0.4444444445 = 0.0000000000 0.0000000000 + x = 1.7249083 + 0.4444444445 x = 1.7249083 + 0.4444444445 Combine like terms: 1.7249083 + 0.4444444445 = 2.1693527445 x = 2.1693527445 Simplifying x = 2.1693527445

Subproblem 2

x + -0.4444444445 = -1.7249083 Simplifying x + -0.4444444445 = -1.7249083 Reorder the terms: -0.4444444445 + x = -1.7249083 Solving -0.4444444445 + x = -1.7249083 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.4444444445' to each side of the equation. -0.4444444445 + 0.4444444445 + x = -1.7249083 + 0.4444444445 Combine like terms: -0.4444444445 + 0.4444444445 = 0.0000000000 0.0000000000 + x = -1.7249083 + 0.4444444445 x = -1.7249083 + 0.4444444445 Combine like terms: -1.7249083 + 0.4444444445 = -1.2804638555 x = -1.2804638555 Simplifying x = -1.2804638555

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.1693527445, -1.2804638555}

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