Answer:
4f^2 -4f+1
Step-by-step explanation:
(2f-1)^2
This is equal to
(2f-1) * (2f-1)
FOIL
first: 2f*2f = 4f^2
outer: 2f*-1 = -2f
inner: -1*2f = -2f
Last = -1*-1 = 1
Add them together: = 4f^2 -2f-2f+1
Combine like terms 4f^2 -4f+1
4f² - 4f + 1
(2f - 1)² = (2f - 1)(2f - 1)
4f² - 2f - 2f + 1
