Factorise: (2x-3)^2-8x+12
(2x)^2+3^2- 2*2x*3-8x+12
=4x^2 +9-12x-8x+12
= 4x^2-20x+21
=(2x-3)(2x-7)
Factorise: (2x−3)2−8x+12