9x^2+2x=14

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Solution for 9x^2+2x=14 equation:


Simplifying
9x2 + 2x = 14

Reorder the terms:
2x + 9x2 = 14

Solving
2x + 9x2 = 14

Solving for variable 'x'.

Reorder the terms:
-14 + 2x + 9x2 = 14 + -14

Combine like terms: 14 + -14 = 0
-14 + 2x + 9x2 = 0

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

Divide each side by '9'.
-1.555555556 + 0.2222222222x + x2 = 0

Move the constant term to the right:

Add '1.555555556' to each side of the equation.
-1.555555556 + 0.2222222222x + 1.555555556 + x2 = 0 + 1.555555556

Reorder the terms:
-1.555555556 + 1.555555556 + 0.2222222222x + x2 = 0 + 1.555555556

Combine like terms: -1.555555556 + 1.555555556 = 0.000000000
0.000000000 + 0.2222222222x + x2 = 0 + 1.555555556
0.2222222222x + x2 = 0 + 1.555555556

Combine like terms: 0 + 1.555555556 = 1.555555556
0.2222222222x + x2 = 1.555555556

The x term is 0.2222222222x.  Take half its coefficient (0.1111111111).
Square it (0.01234567901) and add it to both sides.

Add '0.01234567901' to each side of the equation.
0.2222222222x + 0.01234567901 + x2 = 1.555555556 + 0.01234567901

Reorder the terms:
0.01234567901 + 0.2222222222x + x2 = 1.555555556 + 0.01234567901

Combine like terms: 1.555555556 + 0.01234567901 = 1.56790123501
0.01234567901 + 0.2222222222x + x2 = 1.56790123501

Factor a perfect square on the left side:
(x + 0.1111111111)(x + 0.1111111111) = 1.56790123501

Calculate the square root of the right side: 1.25215863

Break this problem into two subproblems by setting 
(x + 0.1111111111) equal to 1.25215863 and -1.25215863.

Subproblem 1

x + 0.1111111111 = 1.25215863 Simplifying x + 0.1111111111 = 1.25215863 Reorder the terms: 0.1111111111 + x = 1.25215863 Solving 0.1111111111 + x = 1.25215863 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1111111111' to each side of the equation. 0.1111111111 + -0.1111111111 + x = 1.25215863 + -0.1111111111 Combine like terms: 0.1111111111 + -0.1111111111 = 0.0000000000 0.0000000000 + x = 1.25215863 + -0.1111111111 x = 1.25215863 + -0.1111111111 Combine like terms: 1.25215863 + -0.1111111111 = 1.1410475189 x = 1.1410475189 Simplifying x = 1.1410475189

Subproblem 2

x + 0.1111111111 = -1.25215863 Simplifying x + 0.1111111111 = -1.25215863 Reorder the terms: 0.1111111111 + x = -1.25215863 Solving 0.1111111111 + x = -1.25215863 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1111111111' to each side of the equation. 0.1111111111 + -0.1111111111 + x = -1.25215863 + -0.1111111111 Combine like terms: 0.1111111111 + -0.1111111111 = 0.0000000000 0.0000000000 + x = -1.25215863 + -0.1111111111 x = -1.25215863 + -0.1111111111 Combine like terms: -1.25215863 + -0.1111111111 = -1.3632697411 x = -1.3632697411 Simplifying x = -1.3632697411

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.1410475189, -1.3632697411}

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