2w^2+18w-25=0

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Solution for 2w^2+18w-25=0 equation:


Simplifying
2w2 + 18w + -25 = 0

Reorder the terms:
-25 + 18w + 2w2 = 0

Solving
-25 + 18w + 2w2 = 0

Solving for variable 'w'.

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

Divide each side by '2'.
-12.5 + 9w + w2 = 0

Move the constant term to the right:

Add '12.5' to each side of the equation.
-12.5 + 9w + 12.5 + w2 = 0 + 12.5

Reorder the terms:
-12.5 + 12.5 + 9w + w2 = 0 + 12.5

Combine like terms: -12.5 + 12.5 = 0.0
0.0 + 9w + w2 = 0 + 12.5
9w + w2 = 0 + 12.5

Combine like terms: 0 + 12.5 = 12.5
9w + w2 = 12.5

The w term is 9w.  Take half its coefficient (4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
9w + 20.25 + w2 = 12.5 + 20.25

Reorder the terms:
20.25 + 9w + w2 = 12.5 + 20.25

Combine like terms: 12.5 + 20.25 = 32.75
20.25 + 9w + w2 = 32.75

Factor a perfect square on the left side:
(w + 4.5)(w + 4.5) = 32.75

Calculate the square root of the right side: 5.722761571

Break this problem into two subproblems by setting 
(w + 4.5) equal to 5.722761571 and -5.722761571.

Subproblem 1

w + 4.5 = 5.722761571 Simplifying w + 4.5 = 5.722761571 Reorder the terms: 4.5 + w = 5.722761571 Solving 4.5 + w = 5.722761571 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + w = 5.722761571 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + w = 5.722761571 + -4.5 w = 5.722761571 + -4.5 Combine like terms: 5.722761571 + -4.5 = 1.222761571 w = 1.222761571 Simplifying w = 1.222761571

Subproblem 2

w + 4.5 = -5.722761571 Simplifying w + 4.5 = -5.722761571 Reorder the terms: 4.5 + w = -5.722761571 Solving 4.5 + w = -5.722761571 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + w = -5.722761571 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + w = -5.722761571 + -4.5 w = -5.722761571 + -4.5 Combine like terms: -5.722761571 + -4.5 = -10.222761571 w = -10.222761571 Simplifying w = -10.222761571

Solution

The solution to the problem is based on the solutions from the subproblems. w = {1.222761571, -10.222761571}

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