pliss dibantu kakak2 soalnya dikumpulin besok

1.

a×b = 5
b×a = 5
(a×b) × c = 20
b×c = 20
a × (b×c) = 20

2.

a×b = -12
b×a = -12
(a×b) × c = 36
b×c = -18
a × (b×c) = 36

3.

a×b = -21
b×a = -21
(a×b) × c = -42
b×c = -14
a × (b×c) = -42

4.

a×b = 32
b×a = 32
(a×b) × c = -32
b×c = 8
a × (b×c) = -32