Question

verify a×(b×c)=(a×b)×c for :a=-13/15 b=-20/26 c=-5/4​

Answer 1

a x (b x c) = (a x b) x c

13/15 x (-10/13 x -5/4) = (13/15 x -10/13) x -5/4

13/15 x 25/26 = -2/3 x -5/4

5/6 = 10/12

5/6 = 5/6

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