2x^2+29x-18=0

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Solution for 2x^2+29x-18=0 equation:


Simplifying
2x2 + 29x + -18 = 0

Reorder the terms:
-18 + 29x + 2x2 = 0

Solving
-18 + 29x + 2x2 = 0

Solving for variable 'x'.

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

Divide each side by '2'.
-9 + 14.5x + x2 = 0

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + 14.5x + 9 + x2 = 0 + 9

Reorder the terms:
-9 + 9 + 14.5x + x2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 14.5x + x2 = 0 + 9
14.5x + x2 = 0 + 9

Combine like terms: 0 + 9 = 9
14.5x + x2 = 9

The x term is 14.5x.  Take half its coefficient (7.25).
Square it (52.5625) and add it to both sides.

Add '52.5625' to each side of the equation.
14.5x + 52.5625 + x2 = 9 + 52.5625

Reorder the terms:
52.5625 + 14.5x + x2 = 9 + 52.5625

Combine like terms: 9 + 52.5625 = 61.5625
52.5625 + 14.5x + x2 = 61.5625

Factor a perfect square on the left side:
(x + 7.25)(x + 7.25) = 61.5625

Calculate the square root of the right side: 7.846177413

Break this problem into two subproblems by setting 
(x + 7.25) equal to 7.846177413 and -7.846177413.

Subproblem 1

x + 7.25 = 7.846177413 Simplifying x + 7.25 = 7.846177413 Reorder the terms: 7.25 + x = 7.846177413 Solving 7.25 + x = 7.846177413 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7.25' to each side of the equation. 7.25 + -7.25 + x = 7.846177413 + -7.25 Combine like terms: 7.25 + -7.25 = 0.00 0.00 + x = 7.846177413 + -7.25 x = 7.846177413 + -7.25 Combine like terms: 7.846177413 + -7.25 = 0.596177413 x = 0.596177413 Simplifying x = 0.596177413

Subproblem 2

x + 7.25 = -7.846177413 Simplifying x + 7.25 = -7.846177413 Reorder the terms: 7.25 + x = -7.846177413 Solving 7.25 + x = -7.846177413 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7.25' to each side of the equation. 7.25 + -7.25 + x = -7.846177413 + -7.25 Combine like terms: 7.25 + -7.25 = 0.00 0.00 + x = -7.846177413 + -7.25 x = -7.846177413 + -7.25 Combine like terms: -7.846177413 + -7.25 = -15.096177413 x = -15.096177413 Simplifying x = -15.096177413

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.596177413, -15.096177413}

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