2x^2+23x-4.9=0

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Solution for 2x^2+23x-4.9=0 equation:


Simplifying
2x2 + 23x + -4.9 = 0

Reorder the terms:
-4.9 + 23x + 2x2 = 0

Solving
-4.9 + 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'.
-2.45 + 11.5x + x2 = 0

Move the constant term to the right:

Add '2.45' to each side of the equation.
-2.45 + 11.5x + 2.45 + x2 = 0 + 2.45

Reorder the terms:
-2.45 + 2.45 + 11.5x + x2 = 0 + 2.45

Combine like terms: -2.45 + 2.45 = 0.00
0.00 + 11.5x + x2 = 0 + 2.45
11.5x + x2 = 0 + 2.45

Combine like terms: 0 + 2.45 = 2.45
11.5x + x2 = 2.45

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 = 2.45 + 33.0625

Reorder the terms:
33.0625 + 11.5x + x2 = 2.45 + 33.0625

Combine like terms: 2.45 + 33.0625 = 35.5125
33.0625 + 11.5x + x2 = 35.5125

Factor a perfect square on the left side:
(x + 5.75)(x + 5.75) = 35.5125

Calculate the square root of the right side: 5.959236528

Break this problem into two subproblems by setting 
(x + 5.75) equal to 5.959236528 and -5.959236528.

Subproblem 1

x + 5.75 = 5.959236528 Simplifying x + 5.75 = 5.959236528 Reorder the terms: 5.75 + x = 5.959236528 Solving 5.75 + x = 5.959236528 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 = 5.959236528 + -5.75 Combine like terms: 5.75 + -5.75 = 0.00 0.00 + x = 5.959236528 + -5.75 x = 5.959236528 + -5.75 Combine like terms: 5.959236528 + -5.75 = 0.209236528 x = 0.209236528 Simplifying x = 0.209236528

Subproblem 2

x + 5.75 = -5.959236528 Simplifying x + 5.75 = -5.959236528 Reorder the terms: 5.75 + x = -5.959236528 Solving 5.75 + x = -5.959236528 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 = -5.959236528 + -5.75 Combine like terms: 5.75 + -5.75 = 0.00 0.00 + x = -5.959236528 + -5.75 x = -5.959236528 + -5.75 Combine like terms: -5.959236528 + -5.75 = -11.709236528 x = -11.709236528 Simplifying x = -11.709236528

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.209236528, -11.709236528}

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