4w^2-2w=87

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Solution for 4w^2-2w=87 equation:


Simplifying
4w2 + -2w = 87

Reorder the terms:
-2w + 4w2 = 87

Solving
-2w + 4w2 = 87

Solving for variable 'w'.

Reorder the terms:
-87 + -2w + 4w2 = 87 + -87

Combine like terms: 87 + -87 = 0
-87 + -2w + 4w2 = 0

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

Divide each side by '4'.
-21.75 + -0.5w + w2 = 0

Move the constant term to the right:

Add '21.75' to each side of the equation.
-21.75 + -0.5w + 21.75 + w2 = 0 + 21.75

Reorder the terms:
-21.75 + 21.75 + -0.5w + w2 = 0 + 21.75

Combine like terms: -21.75 + 21.75 = 0.00
0.00 + -0.5w + w2 = 0 + 21.75
-0.5w + w2 = 0 + 21.75

Combine like terms: 0 + 21.75 = 21.75
-0.5w + w2 = 21.75

The w term is -0.5w.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5w + 0.0625 + w2 = 21.75 + 0.0625

Reorder the terms:
0.0625 + -0.5w + w2 = 21.75 + 0.0625

Combine like terms: 21.75 + 0.0625 = 21.8125
0.0625 + -0.5w + w2 = 21.8125

Factor a perfect square on the left side:
(w + -0.25)(w + -0.25) = 21.8125

Calculate the square root of the right side: 4.670385423

Break this problem into two subproblems by setting 
(w + -0.25) equal to 4.670385423 and -4.670385423.

Subproblem 1

w + -0.25 = 4.670385423 Simplifying w + -0.25 = 4.670385423 Reorder the terms: -0.25 + w = 4.670385423 Solving -0.25 + w = 4.670385423 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + w = 4.670385423 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + w = 4.670385423 + 0.25 w = 4.670385423 + 0.25 Combine like terms: 4.670385423 + 0.25 = 4.920385423 w = 4.920385423 Simplifying w = 4.920385423

Subproblem 2

w + -0.25 = -4.670385423 Simplifying w + -0.25 = -4.670385423 Reorder the terms: -0.25 + w = -4.670385423 Solving -0.25 + w = -4.670385423 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + w = -4.670385423 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + w = -4.670385423 + 0.25 w = -4.670385423 + 0.25 Combine like terms: -4.670385423 + 0.25 = -4.420385423 w = -4.420385423 Simplifying w = -4.420385423

Solution

The solution to the problem is based on the solutions from the subproblems. w = {4.920385423, -4.420385423}

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