-4b^2-4=-8b

Solution for -4b^2-4=-8b equation:

Simplifying
-4b2 + -4 = -8b

Reorder the terms:
-4 + -4b2 = -8b

Solving
-4 + -4b2 = -8b

Solving for variable 'b'.

Reorder the terms:
-4 + 8b + -4b2 = -8b + 8b

Combine like terms: -8b + 8b = 0
-4 + 8b + -4b2 = 0

Factor out the Greatest Common Factor (GCF), '4'.
4(-1 + 2b + -1b2) = 0

Factor a trinomial.
4((-1 + b)(1 + -1b)) = 0

Ignore the factor 4.
Subproblem 1
Set the factor '(-1 + b)' equal to zero and attempt to solve:

Simplifying
-1 + b = 0

Solving
-1 + b = 0

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

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

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

Combine like terms: 0 + 1 = 1
b = 1

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

Simplifying
1 + -1b = 0

Solving
1 + -1b = 0

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

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

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

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

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

Simplifying
b = 1
Solution
b = {1, 1}