Question

factorise using adentise

Answer 1

$4 {y}^{2} - 4y + 1 \\ \\ = {(2y)}^{2} - 2(2y)(1) + {(1)}^{2} \\ \\ = {(2y - 1)}^{2} \\ \\ = (2y - 1)(2y - 1)$

Answer 2

Hope it's helps............