5w^2-17w-11.56=0

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Solution for 5w^2-17w-11.56=0 equation:


Simplifying
5w2 + -17w + -11.56 = 0

Reorder the terms:
-11.56 + -17w + 5w2 = 0

Solving
-11.56 + -17w + 5w2 = 0

Solving for variable 'w'.

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

Divide each side by '5'.
-2.312 + -3.4w + w2 = 0

Move the constant term to the right:

Add '2.312' to each side of the equation.
-2.312 + -3.4w + 2.312 + w2 = 0 + 2.312

Reorder the terms:
-2.312 + 2.312 + -3.4w + w2 = 0 + 2.312

Combine like terms: -2.312 + 2.312 = 0.000
0.000 + -3.4w + w2 = 0 + 2.312
-3.4w + w2 = 0 + 2.312

Combine like terms: 0 + 2.312 = 2.312
-3.4w + w2 = 2.312

The w term is -3.4w.  Take half its coefficient (-1.7).
Square it (2.89) and add it to both sides.

Add '2.89' to each side of the equation.
-3.4w + 2.89 + w2 = 2.312 + 2.89

Reorder the terms:
2.89 + -3.4w + w2 = 2.312 + 2.89

Combine like terms: 2.312 + 2.89 = 5.202
2.89 + -3.4w + w2 = 5.202

Factor a perfect square on the left side:
(w + -1.7)(w + -1.7) = 5.202

Calculate the square root of the right side: 2.280789337

Break this problem into two subproblems by setting 
(w + -1.7) equal to 2.280789337 and -2.280789337.

Subproblem 1

w + -1.7 = 2.280789337 Simplifying w + -1.7 = 2.280789337 Reorder the terms: -1.7 + w = 2.280789337 Solving -1.7 + w = 2.280789337 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '1.7' to each side of the equation. -1.7 + 1.7 + w = 2.280789337 + 1.7 Combine like terms: -1.7 + 1.7 = 0.0 0.0 + w = 2.280789337 + 1.7 w = 2.280789337 + 1.7 Combine like terms: 2.280789337 + 1.7 = 3.980789337 w = 3.980789337 Simplifying w = 3.980789337

Subproblem 2

w + -1.7 = -2.280789337 Simplifying w + -1.7 = -2.280789337 Reorder the terms: -1.7 + w = -2.280789337 Solving -1.7 + w = -2.280789337 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '1.7' to each side of the equation. -1.7 + 1.7 + w = -2.280789337 + 1.7 Combine like terms: -1.7 + 1.7 = 0.0 0.0 + w = -2.280789337 + 1.7 w = -2.280789337 + 1.7 Combine like terms: -2.280789337 + 1.7 = -0.580789337 w = -0.580789337 Simplifying w = -0.580789337

Solution

The solution to the problem is based on the solutions from the subproblems. w = {3.980789337, -0.580789337}

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