3x^2+2x+10=900

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Solution for 3x^2+2x+10=900 equation:


Simplifying
3x2 + 2x + 10 = 900

Reorder the terms:
10 + 2x + 3x2 = 900

Solving
10 + 2x + 3x2 = 900

Solving for variable 'x'.

Reorder the terms:
10 + -900 + 2x + 3x2 = 900 + -900

Combine like terms: 10 + -900 = -890
-890 + 2x + 3x2 = 900 + -900

Combine like terms: 900 + -900 = 0
-890 + 2x + 3x2 = 0

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

Divide each side by '3'.
-296.6666667 + 0.6666666667x + x2 = 0

Move the constant term to the right:

Add '296.6666667' to each side of the equation.
-296.6666667 + 0.6666666667x + 296.6666667 + x2 = 0 + 296.6666667

Reorder the terms:
-296.6666667 + 296.6666667 + 0.6666666667x + x2 = 0 + 296.6666667

Combine like terms: -296.6666667 + 296.6666667 = 0.0000000
0.0000000 + 0.6666666667x + x2 = 0 + 296.6666667
0.6666666667x + x2 = 0 + 296.6666667

Combine like terms: 0 + 296.6666667 = 296.6666667
0.6666666667x + x2 = 296.6666667

The x term is 0.6666666667x.  Take half its coefficient (0.3333333334).
Square it (0.1111111112) and add it to both sides.

Add '0.1111111112' to each side of the equation.
0.6666666667x + 0.1111111112 + x2 = 296.6666667 + 0.1111111112

Reorder the terms:
0.1111111112 + 0.6666666667x + x2 = 296.6666667 + 0.1111111112

Combine like terms: 296.6666667 + 0.1111111112 = 296.7777778112
0.1111111112 + 0.6666666667x + x2 = 296.7777778112

Factor a perfect square on the left side:
(x + 0.3333333334)(x + 0.3333333334) = 296.7777778112

Calculate the square root of the right side: 17.227239414

Break this problem into two subproblems by setting 
(x + 0.3333333334) equal to 17.227239414 and -17.227239414.

Subproblem 1

x + 0.3333333334 = 17.227239414 Simplifying x + 0.3333333334 = 17.227239414 Reorder the terms: 0.3333333334 + x = 17.227239414 Solving 0.3333333334 + x = 17.227239414 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + x = 17.227239414 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = 17.227239414 + -0.3333333334 x = 17.227239414 + -0.3333333334 Combine like terms: 17.227239414 + -0.3333333334 = 16.8939060806 x = 16.8939060806 Simplifying x = 16.8939060806

Subproblem 2

x + 0.3333333334 = -17.227239414 Simplifying x + 0.3333333334 = -17.227239414 Reorder the terms: 0.3333333334 + x = -17.227239414 Solving 0.3333333334 + x = -17.227239414 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3333333334' to each side of the equation. 0.3333333334 + -0.3333333334 + x = -17.227239414 + -0.3333333334 Combine like terms: 0.3333333334 + -0.3333333334 = 0.0000000000 0.0000000000 + x = -17.227239414 + -0.3333333334 x = -17.227239414 + -0.3333333334 Combine like terms: -17.227239414 + -0.3333333334 = -17.5605727474 x = -17.5605727474 Simplifying x = -17.5605727474

Solution

The solution to the problem is based on the solutions from the subproblems. x = {16.8939060806, -17.5605727474}

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