w(2w+3)=200

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Solution for w(2w+3)=200 equation:


Simplifying
w(2w + 3) = 200

Reorder the terms:
w(3 + 2w) = 200
(3 * w + 2w * w) = 200
(3w + 2w2) = 200

Solving
3w + 2w2 = 200

Solving for variable 'w'.

Reorder the terms:
-200 + 3w + 2w2 = 200 + -200

Combine like terms: 200 + -200 = 0
-200 + 3w + 2w2 = 0

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

Divide each side by '2'.
-100 + 1.5w + w2 = 0

Move the constant term to the right:

Add '100' to each side of the equation.
-100 + 1.5w + 100 + w2 = 0 + 100

Reorder the terms:
-100 + 100 + 1.5w + w2 = 0 + 100

Combine like terms: -100 + 100 = 0
0 + 1.5w + w2 = 0 + 100
1.5w + w2 = 0 + 100

Combine like terms: 0 + 100 = 100
1.5w + w2 = 100

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 = 100 + 0.5625

Reorder the terms:
0.5625 + 1.5w + w2 = 100 + 0.5625

Combine like terms: 100 + 0.5625 = 100.5625
0.5625 + 1.5w + w2 = 100.5625

Factor a perfect square on the left side:
(w + 0.75)(w + 0.75) = 100.5625

Calculate the square root of the right side: 10.02808556

Break this problem into two subproblems by setting 
(w + 0.75) equal to 10.02808556 and -10.02808556.

Subproblem 1

w + 0.75 = 10.02808556 Simplifying w + 0.75 = 10.02808556 Reorder the terms: 0.75 + w = 10.02808556 Solving 0.75 + w = 10.02808556 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 = 10.02808556 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + w = 10.02808556 + -0.75 w = 10.02808556 + -0.75 Combine like terms: 10.02808556 + -0.75 = 9.27808556 w = 9.27808556 Simplifying w = 9.27808556

Subproblem 2

w + 0.75 = -10.02808556 Simplifying w + 0.75 = -10.02808556 Reorder the terms: 0.75 + w = -10.02808556 Solving 0.75 + w = -10.02808556 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 = -10.02808556 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + w = -10.02808556 + -0.75 w = -10.02808556 + -0.75 Combine like terms: -10.02808556 + -0.75 = -10.77808556 w = -10.77808556 Simplifying w = -10.77808556

Solution

The solution to the problem is based on the solutions from the subproblems. w = {9.27808556, -10.77808556}

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