Question

Find the product

(2f-1)^2

Answer 1

4f² - 4f + 1

Explanation:

(2f - 1)² = (2f - 1)(2f - 1)

4f² - 2f - 2f + 1

4f² - 4f + 1

Answer 2

4f^2 -4f+1

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