9x^2+18x=14

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Solution for 9x^2+18x=14 equation:


Simplifying
9x2 + 18x = 14

Reorder the terms:
18x + 9x2 = 14

Solving
18x + 9x2 = 14

Solving for variable 'x'.

Reorder the terms:
-14 + 18x + 9x2 = 14 + -14

Combine like terms: 14 + -14 = 0
-14 + 18x + 9x2 = 0

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

Divide each side by '9'.
-1.555555556 + 2x + x2 = 0

Move the constant term to the right:

Add '1.555555556' to each side of the equation.
-1.555555556 + 2x + 1.555555556 + x2 = 0 + 1.555555556

Reorder the terms:
-1.555555556 + 1.555555556 + 2x + x2 = 0 + 1.555555556

Combine like terms: -1.555555556 + 1.555555556 = 0.000000000
0.000000000 + 2x + x2 = 0 + 1.555555556
2x + x2 = 0 + 1.555555556

Combine like terms: 0 + 1.555555556 = 1.555555556
2x + x2 = 1.555555556

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 1.555555556 + 1

Reorder the terms:
1 + 2x + x2 = 1.555555556 + 1

Combine like terms: 1.555555556 + 1 = 2.555555556
1 + 2x + x2 = 2.555555556

Factor a perfect square on the left side:
(x + 1)(x + 1) = 2.555555556

Calculate the square root of the right side: 1.598610508

Break this problem into two subproblems by setting 
(x + 1) equal to 1.598610508 and -1.598610508.

Subproblem 1

x + 1 = 1.598610508 Simplifying x + 1 = 1.598610508 Reorder the terms: 1 + x = 1.598610508 Solving 1 + x = 1.598610508 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 1.598610508 + -1 Combine like terms: 1 + -1 = 0 0 + x = 1.598610508 + -1 x = 1.598610508 + -1 Combine like terms: 1.598610508 + -1 = 0.598610508 x = 0.598610508 Simplifying x = 0.598610508

Subproblem 2

x + 1 = -1.598610508 Simplifying x + 1 = -1.598610508 Reorder the terms: 1 + x = -1.598610508 Solving 1 + x = -1.598610508 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -1.598610508 + -1 Combine like terms: 1 + -1 = 0 0 + x = -1.598610508 + -1 x = -1.598610508 + -1 Combine like terms: -1.598610508 + -1 = -2.598610508 x = -2.598610508 Simplifying x = -2.598610508

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.598610508, -2.598610508}

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