(10w-1)(10w+1)=20w

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Solution for (10w-1)(10w+1)=20w equation:


Simplifying
(10w + -1)(10w + 1) = 20w

Reorder the terms:
(-1 + 10w)(10w + 1) = 20w

Reorder the terms:
(-1 + 10w)(1 + 10w) = 20w

Multiply (-1 + 10w) * (1 + 10w)
(-1(1 + 10w) + 10w * (1 + 10w)) = 20w
((1 * -1 + 10w * -1) + 10w * (1 + 10w)) = 20w
((-1 + -10w) + 10w * (1 + 10w)) = 20w
(-1 + -10w + (1 * 10w + 10w * 10w)) = 20w
(-1 + -10w + (10w + 100w2)) = 20w

Combine like terms: -10w + 10w = 0
(-1 + 0 + 100w2) = 20w
(-1 + 100w2) = 20w

Solving
-1 + 100w2 = 20w

Solving for variable 'w'.

Reorder the terms:
-1 + -20w + 100w2 = 20w + -20w

Combine like terms: 20w + -20w = 0
-1 + -20w + 100w2 = 0

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

Divide each side by '100'.
-0.01 + -0.2w + w2 = 0.00

Move the constant term to the right:

Add '0.01' to each side of the equation.
-0.01 + -0.2w + 0.01 + w2 = 0.00 + 0.01

Reorder the terms:
-0.01 + 0.01 + -0.2w + w2 = 0.00 + 0.01

Combine like terms: -0.01 + 0.01 = 0.00
0.00 + -0.2w + w2 = 0.00 + 0.01
-0.2w + w2 = 0.00 + 0.01

Combine like terms: 0.00 + 0.01 = 0.01
-0.2w + w2 = 0.01

The w term is -0.2w.  Take half its coefficient (-0.1).
Square it (0.01) and add it to both sides.

Add '0.01' to each side of the equation.
-0.2w + 0.01 + w2 = 0.01 + 0.01

Reorder the terms:
0.01 + -0.2w + w2 = 0.01 + 0.01

Combine like terms: 0.01 + 0.01 = 0.02
0.01 + -0.2w + w2 = 0.02

Factor a perfect square on the left side:
(w + -0.1)(w + -0.1) = 0.02

Calculate the square root of the right side: 0.141421356

Break this problem into two subproblems by setting 
(w + -0.1) equal to 0.141421356 and -0.141421356.

Subproblem 1

w + -0.1 = 0.141421356 Simplifying w + -0.1 = 0.141421356 Reorder the terms: -0.1 + w = 0.141421356 Solving -0.1 + w = 0.141421356 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + w = 0.141421356 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + w = 0.141421356 + 0.1 w = 0.141421356 + 0.1 Combine like terms: 0.141421356 + 0.1 = 0.241421356 w = 0.241421356 Simplifying w = 0.241421356

Subproblem 2

w + -0.1 = -0.141421356 Simplifying w + -0.1 = -0.141421356 Reorder the terms: -0.1 + w = -0.141421356 Solving -0.1 + w = -0.141421356 Solving for variable 'w'. Move all terms containing w to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + w = -0.141421356 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + w = -0.141421356 + 0.1 w = -0.141421356 + 0.1 Combine like terms: -0.141421356 + 0.1 = -0.041421356 w = -0.041421356 Simplifying w = -0.041421356

Solution

The solution to the problem is based on the solutions from the subproblems. w = {0.241421356, -0.041421356}

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