2x^2+3x-219=0

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Solution for 2x^2+3x-219=0 equation:


Simplifying
2x2 + 3x + -219 = 0

Reorder the terms:
-219 + 3x + 2x2 = 0

Solving
-219 + 3x + 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'.
-109.5 + 1.5x + x2 = 0

Move the constant term to the right:

Add '109.5' to each side of the equation.
-109.5 + 1.5x + 109.5 + x2 = 0 + 109.5

Reorder the terms:
-109.5 + 109.5 + 1.5x + x2 = 0 + 109.5

Combine like terms: -109.5 + 109.5 = 0.0
0.0 + 1.5x + x2 = 0 + 109.5
1.5x + x2 = 0 + 109.5

Combine like terms: 0 + 109.5 = 109.5
1.5x + x2 = 109.5

The x term is 1.5x.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5x + 0.5625 + x2 = 109.5 + 0.5625

Reorder the terms:
0.5625 + 1.5x + x2 = 109.5 + 0.5625

Combine like terms: 109.5 + 0.5625 = 110.0625
0.5625 + 1.5x + x2 = 110.0625

Factor a perfect square on the left side:
(x + 0.75)(x + 0.75) = 110.0625

Calculate the square root of the right side: 10.491067629

Break this problem into two subproblems by setting 
(x + 0.75) equal to 10.491067629 and -10.491067629.

Subproblem 1

x + 0.75 = 10.491067629 Simplifying x + 0.75 = 10.491067629 Reorder the terms: 0.75 + x = 10.491067629 Solving 0.75 + x = 10.491067629 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = 10.491067629 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = 10.491067629 + -0.75 x = 10.491067629 + -0.75 Combine like terms: 10.491067629 + -0.75 = 9.741067629 x = 9.741067629 Simplifying x = 9.741067629

Subproblem 2

x + 0.75 = -10.491067629 Simplifying x + 0.75 = -10.491067629 Reorder the terms: 0.75 + x = -10.491067629 Solving 0.75 + x = -10.491067629 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + x = -10.491067629 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = -10.491067629 + -0.75 x = -10.491067629 + -0.75 Combine like terms: -10.491067629 + -0.75 = -11.241067629 x = -11.241067629 Simplifying x = -11.241067629

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.741067629, -11.241067629}

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