2x^2+23x-7.5=0

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Solution for 2x^2+23x-7.5=0 equation:


Simplifying
2x2 + 23x + -7.5 = 0

Reorder the terms:
-7.5 + 23x + 2x2 = 0

Solving
-7.5 + 23x + 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'.
-3.75 + 11.5x + x2 = 0

Move the constant term to the right:

Add '3.75' to each side of the equation.
-3.75 + 11.5x + 3.75 + x2 = 0 + 3.75

Reorder the terms:
-3.75 + 3.75 + 11.5x + x2 = 0 + 3.75

Combine like terms: -3.75 + 3.75 = 0.00
0.00 + 11.5x + x2 = 0 + 3.75
11.5x + x2 = 0 + 3.75

Combine like terms: 0 + 3.75 = 3.75
11.5x + x2 = 3.75

The x term is 11.5x.  Take half its coefficient (5.75).
Square it (33.0625) and add it to both sides.

Add '33.0625' to each side of the equation.
11.5x + 33.0625 + x2 = 3.75 + 33.0625

Reorder the terms:
33.0625 + 11.5x + x2 = 3.75 + 33.0625

Combine like terms: 3.75 + 33.0625 = 36.8125
33.0625 + 11.5x + x2 = 36.8125

Factor a perfect square on the left side:
(x + 5.75)(x + 5.75) = 36.8125

Calculate the square root of the right side: 6.06733055

Break this problem into two subproblems by setting 
(x + 5.75) equal to 6.06733055 and -6.06733055.

Subproblem 1

x + 5.75 = 6.06733055 Simplifying x + 5.75 = 6.06733055 Reorder the terms: 5.75 + x = 6.06733055 Solving 5.75 + x = 6.06733055 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.75' to each side of the equation. 5.75 + -5.75 + x = 6.06733055 + -5.75 Combine like terms: 5.75 + -5.75 = 0.00 0.00 + x = 6.06733055 + -5.75 x = 6.06733055 + -5.75 Combine like terms: 6.06733055 + -5.75 = 0.31733055 x = 0.31733055 Simplifying x = 0.31733055

Subproblem 2

x + 5.75 = -6.06733055 Simplifying x + 5.75 = -6.06733055 Reorder the terms: 5.75 + x = -6.06733055 Solving 5.75 + x = -6.06733055 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5.75' to each side of the equation. 5.75 + -5.75 + x = -6.06733055 + -5.75 Combine like terms: 5.75 + -5.75 = 0.00 0.00 + x = -6.06733055 + -5.75 x = -6.06733055 + -5.75 Combine like terms: -6.06733055 + -5.75 = -11.81733055 x = -11.81733055 Simplifying x = -11.81733055

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.31733055, -11.81733055}

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