Question

How to factorise 4z^2-4z+1

Answer 1

Answer:

(2z-1)²

Explanation:

Using the identity (a-b)²,

4z²-4z+1

= (2z)²-(2)(2z)(1)+(1)²

= (2z-1)²

Answer 2

Answer:

(2z-1)(2z-1)

Step-by-step explanation:

Using identity : (a-b)^2 = a² + 2ab + b²

(2z)² - (2)(2z)(1) + (1)²

(2z - 1)(2z - 1)²