2w^2+3w-99=0

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Solution for 2w^2+3w-99=0 equation:


Simplifying
2w2 + 3w + -99 = 0

Reorder the terms:
-99 + 3w + 2w2 = 0

Solving
-99 + 3w + 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'.
-49.5 + 1.5w + w2 = 0

Move the constant term to the right:

Add '49.5' to each side of the equation.
-49.5 + 1.5w + 49.5 + w2 = 0 + 49.5

Reorder the terms:
-49.5 + 49.5 + 1.5w + w2 = 0 + 49.5

Combine like terms: -49.5 + 49.5 = 0.0
0.0 + 1.5w + w2 = 0 + 49.5
1.5w + w2 = 0 + 49.5

Combine like terms: 0 + 49.5 = 49.5
1.5w + w2 = 49.5

The w term is 1.5w.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5w + 0.5625 + w2 = 49.5 + 0.5625

Reorder the terms:
0.5625 + 1.5w + w2 = 49.5 + 0.5625

Combine like terms: 49.5 + 0.5625 = 50.0625
0.5625 + 1.5w + w2 = 50.0625

Factor a perfect square on the left side:
(w + 0.75)(w + 0.75) = 50.0625

Calculate the square root of the right side: 7.075485849

Break this problem into two subproblems by setting 
(w + 0.75) equal to 7.075485849 and -7.075485849.

Subproblem 1

w + 0.75 = 7.075485849 Simplifying w + 0.75 = 7.075485849 Reorder the terms: 0.75 + w = 7.075485849 Solving 0.75 + w = 7.075485849 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + w = 7.075485849 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + w = 7.075485849 + -0.75 w = 7.075485849 + -0.75 Combine like terms: 7.075485849 + -0.75 = 6.325485849 w = 6.325485849 Simplifying w = 6.325485849

Subproblem 2

w + 0.75 = -7.075485849 Simplifying w + 0.75 = -7.075485849 Reorder the terms: 0.75 + w = -7.075485849 Solving 0.75 + w = -7.075485849 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + w = -7.075485849 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + w = -7.075485849 + -0.75 w = -7.075485849 + -0.75 Combine like terms: -7.075485849 + -0.75 = -7.825485849 w = -7.825485849 Simplifying w = -7.825485849

Solution

The solution to the problem is based on the solutions from the subproblems. w = {6.325485849, -7.825485849}

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