Question

помогите решить!!!!!!!!!!!!!!!!!!!!!

Answer 1

135²-135*150+75² / 135²-15²+45²-105²=
135²-135*2*75+75² / (135-15)(135+15)+(45-105)(45+105)=
(135-75)² / 120*150+(-60)*150 = 60²/150(120-60) =
60²/150*60=
60/150= 2/5