bentuk sedeehana daru (2/7+6/5)(3/7-4/5)

(2/7 + 6/5)(3/7 - 4/5)
= (10+42)/35 x (15-28)/35
= 52/35 x (-17)/35
= -884/1.225

(2/7+6/5)(3/7-4/5)
= 2/7×3/7+2/7×(-4/5)+6/5×3/7+6/5×(-4/5)
= 6/49+(-8/35)+18/35+(-24/25)
= 150/1225-280/1225+630/1225-1176/1225
= -676/1225