2x^2+3x-133=0

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Solution for 2x^2+3x-133=0 equation:


Simplifying
2x2 + 3x + -133 = 0

Reorder the terms:
-133 + 3x + 2x2 = 0

Solving
-133 + 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'.
-66.5 + 1.5x + x2 = 0

Move the constant term to the right:

Add '66.5' to each side of the equation.
-66.5 + 1.5x + 66.5 + x2 = 0 + 66.5

Reorder the terms:
-66.5 + 66.5 + 1.5x + x2 = 0 + 66.5

Combine like terms: -66.5 + 66.5 = 0.0
0.0 + 1.5x + x2 = 0 + 66.5
1.5x + x2 = 0 + 66.5

Combine like terms: 0 + 66.5 = 66.5
1.5x + x2 = 66.5

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 = 66.5 + 0.5625

Reorder the terms:
0.5625 + 1.5x + x2 = 66.5 + 0.5625

Combine like terms: 66.5 + 0.5625 = 67.0625
0.5625 + 1.5x + x2 = 67.0625

Factor a perfect square on the left side:
(x + 0.75)(x + 0.75) = 67.0625

Calculate the square root of the right side: 8.189169677

Break this problem into two subproblems by setting 
(x + 0.75) equal to 8.189169677 and -8.189169677.

Subproblem 1

x + 0.75 = 8.189169677 Simplifying x + 0.75 = 8.189169677 Reorder the terms: 0.75 + x = 8.189169677 Solving 0.75 + x = 8.189169677 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 = 8.189169677 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = 8.189169677 + -0.75 x = 8.189169677 + -0.75 Combine like terms: 8.189169677 + -0.75 = 7.439169677 x = 7.439169677 Simplifying x = 7.439169677

Subproblem 2

x + 0.75 = -8.189169677 Simplifying x + 0.75 = -8.189169677 Reorder the terms: 0.75 + x = -8.189169677 Solving 0.75 + x = -8.189169677 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 = -8.189169677 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + x = -8.189169677 + -0.75 x = -8.189169677 + -0.75 Combine like terms: -8.189169677 + -0.75 = -8.939169677 x = -8.939169677 Simplifying x = -8.939169677

Solution

The solution to the problem is based on the solutions from the subproblems. x = {7.439169677, -8.939169677}

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