b*b-4b+4=16

Solution for b*b-4b+4=16 equation:

Simplifying
b * b + -4b + 4 = 16

Multiply b * b
b2 + -4b + 4 = 16

Reorder the terms:
4 + -4b + b2 = 16

Solving
4 + -4b + b2 = 16

Solving for variable 'b'.

Reorder the terms:
4 + -16 + -4b + b2 = 16 + -16

Combine like terms: 4 + -16 = -12
-12 + -4b + b2 = 16 + -16

Combine like terms: 16 + -16 = 0
-12 + -4b + b2 = 0

Factor a trinomial.
(-2 + -1b)(6 + -1b) = 0

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

Simplifying
-2 + -1b = 0

Solving
-2 + -1b = 0

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

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

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

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

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

Simplifying
b = -2
Subproblem 2
Set the factor '(6 + -1b)' equal to zero and attempt to solve:

Simplifying
6 + -1b = 0

Solving
6 + -1b = 0

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

Add '-6' to each side of the equation.
6 + -6 + -1b = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -1b = 0 + -6
-1b = 0 + -6

Combine like terms: 0 + -6 = -6
-1b = -6

Divide each side by '-1'.
b = 6

Simplifying
b = 6
Solution
b = {-2, 6}