144=w^2+8w+81

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Solution for 144=w^2+8w+81 equation:


Simplifying
144 = w2 + 8w + 81

Reorder the terms:
144 = 81 + 8w + w2

Solving
144 = 81 + 8w + w2

Solving for variable 'w'.

Combine like terms: 144 + -81 = 63
63 + -8w + -1w2 = 81 + 8w + w2 + -81 + -8w + -1w2

Reorder the terms:
63 + -8w + -1w2 = 81 + -81 + 8w + -8w + w2 + -1w2

Combine like terms: 81 + -81 = 0
63 + -8w + -1w2 = 0 + 8w + -8w + w2 + -1w2
63 + -8w + -1w2 = 8w + -8w + w2 + -1w2

Combine like terms: 8w + -8w = 0
63 + -8w + -1w2 = 0 + w2 + -1w2
63 + -8w + -1w2 = w2 + -1w2

Combine like terms: w2 + -1w2 = 0
63 + -8w + -1w2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-63 + 8w + w2 = 0

Move the constant term to the right:

Add '63' to each side of the equation.
-63 + 8w + 63 + w2 = 0 + 63

Reorder the terms:
-63 + 63 + 8w + w2 = 0 + 63

Combine like terms: -63 + 63 = 0
0 + 8w + w2 = 0 + 63
8w + w2 = 0 + 63

Combine like terms: 0 + 63 = 63
8w + w2 = 63

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 = 63 + 16

Reorder the terms:
16 + 8w + w2 = 63 + 16

Combine like terms: 63 + 16 = 79
16 + 8w + w2 = 79

Factor a perfect square on the left side:
(w + 4)(w + 4) = 79

Calculate the square root of the right side: 8.888194417

Break this problem into two subproblems by setting 
(w + 4) equal to 8.888194417 and -8.888194417.

Subproblem 1

w + 4 = 8.888194417 Simplifying w + 4 = 8.888194417 Reorder the terms: 4 + w = 8.888194417 Solving 4 + w = 8.888194417 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 = 8.888194417 + -4 Combine like terms: 4 + -4 = 0 0 + w = 8.888194417 + -4 w = 8.888194417 + -4 Combine like terms: 8.888194417 + -4 = 4.888194417 w = 4.888194417 Simplifying w = 4.888194417

Subproblem 2

w + 4 = -8.888194417 Simplifying w + 4 = -8.888194417 Reorder the terms: 4 + w = -8.888194417 Solving 4 + w = -8.888194417 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 = -8.888194417 + -4 Combine like terms: 4 + -4 = 0 0 + w = -8.888194417 + -4 w = -8.888194417 + -4 Combine like terms: -8.888194417 + -4 = -12.888194417 w = -12.888194417 Simplifying w = -12.888194417

Solution

The solution to the problem is based on the solutions from the subproblems. w = {4.888194417, -12.888194417}

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