20w^2-20w-40=0

Solution for 20w^2-20w-40=0 equation:

Simplifying
20w2 + -20w + -40 = 0

Reorder the terms:
-40 + -20w + 20w2 = 0

Solving
-40 + -20w + 20w2 = 0

Solving for variable 'w'.

Factor out the Greatest Common Factor (GCF), '20'.
20(-2 + -1w + w2) = 0

Factor a trinomial.
20((-1 + -1w)(2 + -1w)) = 0

Ignore the factor 20.
Subproblem 1
Set the factor '(-1 + -1w)' equal to zero and attempt to solve:

Simplifying
-1 + -1w = 0

Solving
-1 + -1w = 0

Move all terms containing w to the left, all other terms to the right.

Add '1' to each side of the equation.
-1 + 1 + -1w = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -1w = 0 + 1
-1w = 0 + 1

Combine like terms: 0 + 1 = 1
-1w = 1

Divide each side by '-1'.
w = -1

Simplifying
w = -1
Subproblem 2
Set the factor '(2 + -1w)' equal to zero and attempt to solve:

Simplifying
2 + -1w = 0

Solving
2 + -1w = 0

Move all terms containing w to the left, all other terms to the right.

Add '-2' to each side of the equation.
2 + -2 + -1w = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -1w = 0 + -2
-1w = 0 + -2

Combine like terms: 0 + -2 = -2
-1w = -2

Divide each side by '-1'.
w = 2

Simplifying
w = 2
Solution
w = {-1, 2}