3x^2-90+2005x+x=9999999

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Solution for 3x^2-90+2005x+x=9999999 equation:


Simplifying
3x2 + -90 + 2005x + x = 9999999

Reorder the terms:
-90 + 2005x + x + 3x2 = 9999999

Combine like terms: 2005x + x = 2006x
-90 + 2006x + 3x2 = 9999999

Solving
-90 + 2006x + 3x2 = 9999999

Solving for variable 'x'.

Reorder the terms:
-90 + -9999999 + 2006x + 3x2 = 9999999 + -9999999

Combine like terms: -90 + -9999999 = -10000089
-10000089 + 2006x + 3x2 = 9999999 + -9999999

Combine like terms: 9999999 + -9999999 = 0
-10000089 + 2006x + 3x2 = 0

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

Divide each side by '3'.
-3333363 + 668.6666667x + x2 = 0

Move the constant term to the right:

Add '3333363' to each side of the equation.
-3333363 + 668.6666667x + 3333363 + x2 = 0 + 3333363

Reorder the terms:
-3333363 + 3333363 + 668.6666667x + x2 = 0 + 3333363

Combine like terms: -3333363 + 3333363 = 0
0 + 668.6666667x + x2 = 0 + 3333363
668.6666667x + x2 = 0 + 3333363

Combine like terms: 0 + 3333363 = 3333363
668.6666667x + x2 = 3333363

The x term is 668.6666667x.  Take half its coefficient (334.3333334).
Square it (111778.7778) and add it to both sides.

Add '111778.7778' to each side of the equation.
668.6666667x + 111778.7778 + x2 = 3333363 + 111778.7778

Reorder the terms:
111778.7778 + 668.6666667x + x2 = 3333363 + 111778.7778

Combine like terms: 3333363 + 111778.7778 = 3445141.7778
111778.7778 + 668.6666667x + x2 = 3445141.7778

Factor a perfect square on the left side:
(x + 334.3333334)(x + 334.3333334) = 3445141.7778

Calculate the square root of the right side: 1856.109311921

Break this problem into two subproblems by setting 
(x + 334.3333334) equal to 1856.109311921 and -1856.109311921.

Subproblem 1

x + 334.3333334 = 1856.109311921 Simplifying x + 334.3333334 = 1856.109311921 Reorder the terms: 334.3333334 + x = 1856.109311921 Solving 334.3333334 + x = 1856.109311921 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-334.3333334' to each side of the equation. 334.3333334 + -334.3333334 + x = 1856.109311921 + -334.3333334 Combine like terms: 334.3333334 + -334.3333334 = 0.0000000 0.0000000 + x = 1856.109311921 + -334.3333334 x = 1856.109311921 + -334.3333334 Combine like terms: 1856.109311921 + -334.3333334 = 1521.775978521 x = 1521.775978521 Simplifying x = 1521.775978521

Subproblem 2

x + 334.3333334 = -1856.109311921 Simplifying x + 334.3333334 = -1856.109311921 Reorder the terms: 334.3333334 + x = -1856.109311921 Solving 334.3333334 + x = -1856.109311921 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-334.3333334' to each side of the equation. 334.3333334 + -334.3333334 + x = -1856.109311921 + -334.3333334 Combine like terms: 334.3333334 + -334.3333334 = 0.0000000 0.0000000 + x = -1856.109311921 + -334.3333334 x = -1856.109311921 + -334.3333334 Combine like terms: -1856.109311921 + -334.3333334 = -2190.442645321 x = -2190.442645321 Simplifying x = -2190.442645321

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1521.775978521, -2190.442645321}

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