5w^2-10w-162=0

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Solution for 5w^2-10w-162=0 equation:


Simplifying
5w2 + -10w + -162 = 0

Reorder the terms:
-162 + -10w + 5w2 = 0

Solving
-162 + -10w + 5w2 = 0

Solving for variable 'w'.

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

Divide each side by '5'.
-32.4 + -2w + w2 = 0

Move the constant term to the right:

Add '32.4' to each side of the equation.
-32.4 + -2w + 32.4 + w2 = 0 + 32.4

Reorder the terms:
-32.4 + 32.4 + -2w + w2 = 0 + 32.4

Combine like terms: -32.4 + 32.4 = 0.0
0.0 + -2w + w2 = 0 + 32.4
-2w + w2 = 0 + 32.4

Combine like terms: 0 + 32.4 = 32.4
-2w + w2 = 32.4

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 = 32.4 + 1

Reorder the terms:
1 + -2w + w2 = 32.4 + 1

Combine like terms: 32.4 + 1 = 33.4
1 + -2w + w2 = 33.4

Factor a perfect square on the left side:
(w + -1)(w + -1) = 33.4

Calculate the square root of the right side: 5.779273311

Break this problem into two subproblems by setting 
(w + -1) equal to 5.779273311 and -5.779273311.

Subproblem 1

w + -1 = 5.779273311 Simplifying w + -1 = 5.779273311 Reorder the terms: -1 + w = 5.779273311 Solving -1 + w = 5.779273311 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 = 5.779273311 + 1 Combine like terms: -1 + 1 = 0 0 + w = 5.779273311 + 1 w = 5.779273311 + 1 Combine like terms: 5.779273311 + 1 = 6.779273311 w = 6.779273311 Simplifying w = 6.779273311

Subproblem 2

w + -1 = -5.779273311 Simplifying w + -1 = -5.779273311 Reorder the terms: -1 + w = -5.779273311 Solving -1 + w = -5.779273311 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 = -5.779273311 + 1 Combine like terms: -1 + 1 = 0 0 + w = -5.779273311 + 1 w = -5.779273311 + 1 Combine like terms: -5.779273311 + 1 = -4.779273311 w = -4.779273311 Simplifying w = -4.779273311

Solution

The solution to the problem is based on the solutions from the subproblems. w = {6.779273311, -4.779273311}

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