w^2+8w+128=230

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Solution for w^2+8w+128=230 equation:


Simplifying
w2 + 8w + 128 = 230

Reorder the terms:
128 + 8w + w2 = 230

Solving
128 + 8w + w2 = 230

Solving for variable 'w'.

Reorder the terms:
128 + -230 + 8w + w2 = 230 + -230

Combine like terms: 128 + -230 = -102
-102 + 8w + w2 = 230 + -230

Combine like terms: 230 + -230 = 0
-102 + 8w + w2 = 0

Begin completing the square.

Move the constant term to the right:

Add '102' to each side of the equation.
-102 + 8w + 102 + w2 = 0 + 102

Reorder the terms:
-102 + 102 + 8w + w2 = 0 + 102

Combine like terms: -102 + 102 = 0
0 + 8w + w2 = 0 + 102
8w + w2 = 0 + 102

Combine like terms: 0 + 102 = 102
8w + w2 = 102

The w term is 8w.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8w + 16 + w2 = 102 + 16

Reorder the terms:
16 + 8w + w2 = 102 + 16

Combine like terms: 102 + 16 = 118
16 + 8w + w2 = 118

Factor a perfect square on the left side:
(w + 4)(w + 4) = 118

Calculate the square root of the right side: 10.862780491

Break this problem into two subproblems by setting 
(w + 4) equal to 10.862780491 and -10.862780491.

Subproblem 1

w + 4 = 10.862780491 Simplifying w + 4 = 10.862780491 Reorder the terms: 4 + w = 10.862780491 Solving 4 + w = 10.862780491 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + w = 10.862780491 + -4 Combine like terms: 4 + -4 = 0 0 + w = 10.862780491 + -4 w = 10.862780491 + -4 Combine like terms: 10.862780491 + -4 = 6.862780491 w = 6.862780491 Simplifying w = 6.862780491

Subproblem 2

w + 4 = -10.862780491 Simplifying w + 4 = -10.862780491 Reorder the terms: 4 + w = -10.862780491 Solving 4 + w = -10.862780491 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + w = -10.862780491 + -4 Combine like terms: 4 + -4 = 0 0 + w = -10.862780491 + -4 w = -10.862780491 + -4 Combine like terms: -10.862780491 + -4 = -14.862780491 w = -14.862780491 Simplifying w = -14.862780491

Solution

The solution to the problem is based on the solutions from the subproblems. w = {6.862780491, -14.862780491}

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