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Maaf cuma bisa jawab nomor 3. itupun nggak tau bener atau salah.
1. (2,64+1,41)(2,64-1,41)
= (4,05)(1,23)
= 5
2. (1,41-1,73)(1,41-8,66)
=(-0,317)(-7,24)
=2,3
3. 3,46-4,24+5,65+8,66-1,41
12,124