w^2+2w=10

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Solution for w^2+2w=10 equation:


Simplifying
w2 + 2w = 10

Reorder the terms:
2w + w2 = 10

Solving
2w + w2 = 10

Solving for variable 'w'.

Reorder the terms:
-10 + 2w + w2 = 10 + -10

Combine like terms: 10 + -10 = 0
-10 + 2w + w2 = 0

Begin completing the square.

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + 2w + 10 + w2 = 0 + 10

Reorder the terms:
-10 + 10 + 2w + w2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + 2w + w2 = 0 + 10
2w + w2 = 0 + 10

Combine like terms: 0 + 10 = 10
2w + w2 = 10

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 = 10 + 1

Reorder the terms:
1 + 2w + w2 = 10 + 1

Combine like terms: 10 + 1 = 11
1 + 2w + w2 = 11

Factor a perfect square on the left side:
(w + 1)(w + 1) = 11

Calculate the square root of the right side: 3.31662479

Break this problem into two subproblems by setting 
(w + 1) equal to 3.31662479 and -3.31662479.

Subproblem 1

w + 1 = 3.31662479 Simplifying w + 1 = 3.31662479 Reorder the terms: 1 + w = 3.31662479 Solving 1 + w = 3.31662479 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 = 3.31662479 + -1 Combine like terms: 1 + -1 = 0 0 + w = 3.31662479 + -1 w = 3.31662479 + -1 Combine like terms: 3.31662479 + -1 = 2.31662479 w = 2.31662479 Simplifying w = 2.31662479

Subproblem 2

w + 1 = -3.31662479 Simplifying w + 1 = -3.31662479 Reorder the terms: 1 + w = -3.31662479 Solving 1 + w = -3.31662479 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 = -3.31662479 + -1 Combine like terms: 1 + -1 = 0 0 + w = -3.31662479 + -1 w = -3.31662479 + -1 Combine like terms: -3.31662479 + -1 = -4.31662479 w = -4.31662479 Simplifying w = -4.31662479

Solution

The solution to the problem is based on the solutions from the subproblems. w = {2.31662479, -4.31662479}

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