9x^2+3x=1

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Solution for 9x^2+3x=1 equation:


Simplifying
9x2 + 3x = 1

Reorder the terms:
3x + 9x2 = 1

Solving
3x + 9x2 = 1

Solving for variable 'x'.

Reorder the terms:
-1 + 3x + 9x2 = 1 + -1

Combine like terms: 1 + -1 = 0
-1 + 3x + 9x2 = 0

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

Divide each side by '9'.
-0.1111111111 + 0.3333333333x + x2 = 0

Move the constant term to the right:

Add '0.1111111111' to each side of the equation.
-0.1111111111 + 0.3333333333x + 0.1111111111 + x2 = 0 + 0.1111111111

Reorder the terms:
-0.1111111111 + 0.1111111111 + 0.3333333333x + x2 = 0 + 0.1111111111

Combine like terms: -0.1111111111 + 0.1111111111 = 0.0000000000
0.0000000000 + 0.3333333333x + x2 = 0 + 0.1111111111
0.3333333333x + x2 = 0 + 0.1111111111

Combine like terms: 0 + 0.1111111111 = 0.1111111111
0.3333333333x + x2 = 0.1111111111

The x term is 0.3333333333x.  Take half its coefficient (0.1666666667).
Square it (0.02777777779) and add it to both sides.

Add '0.02777777779' to each side of the equation.
0.3333333333x + 0.02777777779 + x2 = 0.1111111111 + 0.02777777779

Reorder the terms:
0.02777777779 + 0.3333333333x + x2 = 0.1111111111 + 0.02777777779

Combine like terms: 0.1111111111 + 0.02777777779 = 0.13888888889
0.02777777779 + 0.3333333333x + x2 = 0.13888888889

Factor a perfect square on the left side:
(x + 0.1666666667)(x + 0.1666666667) = 0.13888888889

Calculate the square root of the right side: 0.372677996

Break this problem into two subproblems by setting 
(x + 0.1666666667) equal to 0.372677996 and -0.372677996.

Subproblem 1

x + 0.1666666667 = 0.372677996 Simplifying x + 0.1666666667 = 0.372677996 Reorder the terms: 0.1666666667 + x = 0.372677996 Solving 0.1666666667 + x = 0.372677996 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1666666667' to each side of the equation. 0.1666666667 + -0.1666666667 + x = 0.372677996 + -0.1666666667 Combine like terms: 0.1666666667 + -0.1666666667 = 0.0000000000 0.0000000000 + x = 0.372677996 + -0.1666666667 x = 0.372677996 + -0.1666666667 Combine like terms: 0.372677996 + -0.1666666667 = 0.2060113293 x = 0.2060113293 Simplifying x = 0.2060113293

Subproblem 2

x + 0.1666666667 = -0.372677996 Simplifying x + 0.1666666667 = -0.372677996 Reorder the terms: 0.1666666667 + x = -0.372677996 Solving 0.1666666667 + x = -0.372677996 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1666666667' to each side of the equation. 0.1666666667 + -0.1666666667 + x = -0.372677996 + -0.1666666667 Combine like terms: 0.1666666667 + -0.1666666667 = 0.0000000000 0.0000000000 + x = -0.372677996 + -0.1666666667 x = -0.372677996 + -0.1666666667 Combine like terms: -0.372677996 + -0.1666666667 = -0.5393446627 x = -0.5393446627 Simplifying x = -0.5393446627

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.2060113293, -0.5393446627}

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