0=4x^2+34x-11

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Solution for 0=4x^2+34x-11 equation:


Simplifying
0 = 4x2 + 34x + -11

Reorder the terms:
0 = -11 + 34x + 4x2

Solving
0 = -11 + 34x + 4x2

Solving for variable 'x'.

Combine like terms: 0 + 11 = 11
11 + -34x + -4x2 = -11 + 34x + 4x2 + 11 + -34x + -4x2

Reorder the terms:
11 + -34x + -4x2 = -11 + 11 + 34x + -34x + 4x2 + -4x2

Combine like terms: -11 + 11 = 0
11 + -34x + -4x2 = 0 + 34x + -34x + 4x2 + -4x2
11 + -34x + -4x2 = 34x + -34x + 4x2 + -4x2

Combine like terms: 34x + -34x = 0
11 + -34x + -4x2 = 0 + 4x2 + -4x2
11 + -34x + -4x2 = 4x2 + -4x2

Combine like terms: 4x2 + -4x2 = 0
11 + -34x + -4x2 = 0

Begin completing the square.  Divide all terms by
-4 the coefficient of the squared term: 

Divide each side by '-4'.
-2.75 + 8.5x + x2 = 0

Move the constant term to the right:

Add '2.75' to each side of the equation.
-2.75 + 8.5x + 2.75 + x2 = 0 + 2.75

Reorder the terms:
-2.75 + 2.75 + 8.5x + x2 = 0 + 2.75

Combine like terms: -2.75 + 2.75 = 0.00
0.00 + 8.5x + x2 = 0 + 2.75
8.5x + x2 = 0 + 2.75

Combine like terms: 0 + 2.75 = 2.75
8.5x + x2 = 2.75

The x term is 8.5x.  Take half its coefficient (4.25).
Square it (18.0625) and add it to both sides.

Add '18.0625' to each side of the equation.
8.5x + 18.0625 + x2 = 2.75 + 18.0625

Reorder the terms:
18.0625 + 8.5x + x2 = 2.75 + 18.0625

Combine like terms: 2.75 + 18.0625 = 20.8125
18.0625 + 8.5x + x2 = 20.8125

Factor a perfect square on the left side:
(x + 4.25)(x + 4.25) = 20.8125

Calculate the square root of the right side: 4.562071898

Break this problem into two subproblems by setting 
(x + 4.25) equal to 4.562071898 and -4.562071898.

Subproblem 1

x + 4.25 = 4.562071898 Simplifying x + 4.25 = 4.562071898 Reorder the terms: 4.25 + x = 4.562071898 Solving 4.25 + x = 4.562071898 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.25' to each side of the equation. 4.25 + -4.25 + x = 4.562071898 + -4.25 Combine like terms: 4.25 + -4.25 = 0.00 0.00 + x = 4.562071898 + -4.25 x = 4.562071898 + -4.25 Combine like terms: 4.562071898 + -4.25 = 0.312071898 x = 0.312071898 Simplifying x = 0.312071898

Subproblem 2

x + 4.25 = -4.562071898 Simplifying x + 4.25 = -4.562071898 Reorder the terms: 4.25 + x = -4.562071898 Solving 4.25 + x = -4.562071898 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.25' to each side of the equation. 4.25 + -4.25 + x = -4.562071898 + -4.25 Combine like terms: 4.25 + -4.25 = 0.00 0.00 + x = -4.562071898 + -4.25 x = -4.562071898 + -4.25 Combine like terms: -4.562071898 + -4.25 = -8.812071898 x = -8.812071898 Simplifying x = -8.812071898

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.312071898, -8.812071898}

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