w^2+7w-13=0

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Solution for w^2+7w-13=0 equation:


Simplifying
w2 + 7w + -13 = 0

Reorder the terms:
-13 + 7w + w2 = 0

Solving
-13 + 7w + w2 = 0

Solving for variable 'w'.

Begin completing the square.

Move the constant term to the right:

Add '13' to each side of the equation.
-13 + 7w + 13 + w2 = 0 + 13

Reorder the terms:
-13 + 13 + 7w + w2 = 0 + 13

Combine like terms: -13 + 13 = 0
0 + 7w + w2 = 0 + 13
7w + w2 = 0 + 13

Combine like terms: 0 + 13 = 13
7w + w2 = 13

The w term is 7w.  Take half its coefficient (3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
7w + 12.25 + w2 = 13 + 12.25

Reorder the terms:
12.25 + 7w + w2 = 13 + 12.25

Combine like terms: 13 + 12.25 = 25.25
12.25 + 7w + w2 = 25.25

Factor a perfect square on the left side:
(w + 3.5)(w + 3.5) = 25.25

Calculate the square root of the right side: 5.024937811

Break this problem into two subproblems by setting 
(w + 3.5) equal to 5.024937811 and -5.024937811.

Subproblem 1

w + 3.5 = 5.024937811 Simplifying w + 3.5 = 5.024937811 Reorder the terms: 3.5 + w = 5.024937811 Solving 3.5 + w = 5.024937811 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + w = 5.024937811 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + w = 5.024937811 + -3.5 w = 5.024937811 + -3.5 Combine like terms: 5.024937811 + -3.5 = 1.524937811 w = 1.524937811 Simplifying w = 1.524937811

Subproblem 2

w + 3.5 = -5.024937811 Simplifying w + 3.5 = -5.024937811 Reorder the terms: 3.5 + w = -5.024937811 Solving 3.5 + w = -5.024937811 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + w = -5.024937811 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + w = -5.024937811 + -3.5 w = -5.024937811 + -3.5 Combine like terms: -5.024937811 + -3.5 = -8.524937811 w = -8.524937811 Simplifying w = -8.524937811

Solution

The solution to the problem is based on the solutions from the subproblems. w = {1.524937811, -8.524937811}

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