What is b^2-2b+1 factored

(b-1) (b-1)

Step-by-step explanation:

If you don't see a perfect square here, then your objective since the coefficient of b^2 is 1 and this is a quadratic, is to find two numbers that multiply to be 1 and add up to be - 2.

-1 (-1) = 1 and - 1 + (-1) = -2.

So the factored form is (b-1) (b-1) or (b-1) ^2.