-5w^2-13w+16=0

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Solution for -5w^2-13w+16=0 equation:


Simplifying
-5w2 + -13w + 16 = 0

Reorder the terms:
16 + -13w + -5w2 = 0

Solving
16 + -13w + -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'.
-3.2 + 2.6w + w2 = 0

Move the constant term to the right:

Add '3.2' to each side of the equation.
-3.2 + 2.6w + 3.2 + w2 = 0 + 3.2

Reorder the terms:
-3.2 + 3.2 + 2.6w + w2 = 0 + 3.2

Combine like terms: -3.2 + 3.2 = 0.0
0.0 + 2.6w + w2 = 0 + 3.2
2.6w + w2 = 0 + 3.2

Combine like terms: 0 + 3.2 = 3.2
2.6w + w2 = 3.2

The w term is 2.6w.  Take half its coefficient (1.3).
Square it (1.69) and add it to both sides.

Add '1.69' to each side of the equation.
2.6w + 1.69 + w2 = 3.2 + 1.69

Reorder the terms:
1.69 + 2.6w + w2 = 3.2 + 1.69

Combine like terms: 3.2 + 1.69 = 4.89
1.69 + 2.6w + w2 = 4.89

Factor a perfect square on the left side:
(w + 1.3)(w + 1.3) = 4.89

Calculate the square root of the right side: 2.211334439

Break this problem into two subproblems by setting 
(w + 1.3) equal to 2.211334439 and -2.211334439.

Subproblem 1

w + 1.3 = 2.211334439 Simplifying w + 1.3 = 2.211334439 Reorder the terms: 1.3 + w = 2.211334439 Solving 1.3 + w = 2.211334439 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-1.3' to each side of the equation. 1.3 + -1.3 + w = 2.211334439 + -1.3 Combine like terms: 1.3 + -1.3 = 0.0 0.0 + w = 2.211334439 + -1.3 w = 2.211334439 + -1.3 Combine like terms: 2.211334439 + -1.3 = 0.911334439 w = 0.911334439 Simplifying w = 0.911334439

Subproblem 2

w + 1.3 = -2.211334439 Simplifying w + 1.3 = -2.211334439 Reorder the terms: 1.3 + w = -2.211334439 Solving 1.3 + w = -2.211334439 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-1.3' to each side of the equation. 1.3 + -1.3 + w = -2.211334439 + -1.3 Combine like terms: 1.3 + -1.3 = 0.0 0.0 + w = -2.211334439 + -1.3 w = -2.211334439 + -1.3 Combine like terms: -2.211334439 + -1.3 = -3.511334439 w = -3.511334439 Simplifying w = -3.511334439

Solution

The solution to the problem is based on the solutions from the subproblems. w = {0.911334439, -3.511334439}

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