2x^2-11x-17=0

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Solution for 2x^2-11x-17=0 equation:


Simplifying
2x2 + -11x + -17 = 0

Reorder the terms:
-17 + -11x + 2x2 = 0

Solving
-17 + -11x + 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'.
-8.5 + -5.5x + x2 = 0

Move the constant term to the right:

Add '8.5' to each side of the equation.
-8.5 + -5.5x + 8.5 + x2 = 0 + 8.5

Reorder the terms:
-8.5 + 8.5 + -5.5x + x2 = 0 + 8.5

Combine like terms: -8.5 + 8.5 = 0.0
0.0 + -5.5x + x2 = 0 + 8.5
-5.5x + x2 = 0 + 8.5

Combine like terms: 0 + 8.5 = 8.5
-5.5x + x2 = 8.5

The x term is -5.5x.  Take half its coefficient (-2.75).
Square it (7.5625) and add it to both sides.

Add '7.5625' to each side of the equation.
-5.5x + 7.5625 + x2 = 8.5 + 7.5625

Reorder the terms:
7.5625 + -5.5x + x2 = 8.5 + 7.5625

Combine like terms: 8.5 + 7.5625 = 16.0625
7.5625 + -5.5x + x2 = 16.0625

Factor a perfect square on the left side:
(x + -2.75)(x + -2.75) = 16.0625

Calculate the square root of the right side: 4.007804885

Break this problem into two subproblems by setting 
(x + -2.75) equal to 4.007804885 and -4.007804885.

Subproblem 1

x + -2.75 = 4.007804885 Simplifying x + -2.75 = 4.007804885 Reorder the terms: -2.75 + x = 4.007804885 Solving -2.75 + x = 4.007804885 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.75' to each side of the equation. -2.75 + 2.75 + x = 4.007804885 + 2.75 Combine like terms: -2.75 + 2.75 = 0.00 0.00 + x = 4.007804885 + 2.75 x = 4.007804885 + 2.75 Combine like terms: 4.007804885 + 2.75 = 6.757804885 x = 6.757804885 Simplifying x = 6.757804885

Subproblem 2

x + -2.75 = -4.007804885 Simplifying x + -2.75 = -4.007804885 Reorder the terms: -2.75 + x = -4.007804885 Solving -2.75 + x = -4.007804885 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.75' to each side of the equation. -2.75 + 2.75 + x = -4.007804885 + 2.75 Combine like terms: -2.75 + 2.75 = 0.00 0.00 + x = -4.007804885 + 2.75 x = -4.007804885 + 2.75 Combine like terms: -4.007804885 + 2.75 = -1.257804885 x = -1.257804885 Simplifying x = -1.257804885

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.757804885, -1.257804885}

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