w^2+2w=66

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Solution for w^2+2w=66 equation:


Simplifying
w2 + 2w = 66

Reorder the terms:
2w + w2 = 66

Solving
2w + w2 = 66

Solving for variable 'w'.

Reorder the terms:
-66 + 2w + w2 = 66 + -66

Combine like terms: 66 + -66 = 0
-66 + 2w + w2 = 0

Begin completing the square.

Move the constant term to the right:

Add '66' to each side of the equation.
-66 + 2w + 66 + w2 = 0 + 66

Reorder the terms:
-66 + 66 + 2w + w2 = 0 + 66

Combine like terms: -66 + 66 = 0
0 + 2w + w2 = 0 + 66
2w + w2 = 0 + 66

Combine like terms: 0 + 66 = 66
2w + w2 = 66

The w term is 2w.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2w + 1 + w2 = 66 + 1

Reorder the terms:
1 + 2w + w2 = 66 + 1

Combine like terms: 66 + 1 = 67
1 + 2w + w2 = 67

Factor a perfect square on the left side:
(w + 1)(w + 1) = 67

Calculate the square root of the right side: 8.185352772

Break this problem into two subproblems by setting 
(w + 1) equal to 8.185352772 and -8.185352772.

Subproblem 1

w + 1 = 8.185352772 Simplifying w + 1 = 8.185352772 Reorder the terms: 1 + w = 8.185352772 Solving 1 + w = 8.185352772 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + w = 8.185352772 + -1 Combine like terms: 1 + -1 = 0 0 + w = 8.185352772 + -1 w = 8.185352772 + -1 Combine like terms: 8.185352772 + -1 = 7.185352772 w = 7.185352772 Simplifying w = 7.185352772

Subproblem 2

w + 1 = -8.185352772 Simplifying w + 1 = -8.185352772 Reorder the terms: 1 + w = -8.185352772 Solving 1 + w = -8.185352772 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + w = -8.185352772 + -1 Combine like terms: 1 + -1 = 0 0 + w = -8.185352772 + -1 w = -8.185352772 + -1 Combine like terms: -8.185352772 + -1 = -9.185352772 w = -9.185352772 Simplifying w = -9.185352772

Solution

The solution to the problem is based on the solutions from the subproblems. w = {7.185352772, -9.185352772}

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