Step-by-step explanation:
(a) => 11/-15 * -7/6
= -77/-90
= 77/90
=> -7/6 * 11/-15
(b) => -3/4 * 12/5
= -36/20
=> 12/5 * -3/4
-36/20
(c) => -27/-8 * 1/9
= -27/-72
27/72
=> 1/9 * -27/-8
= 27/72
(d) => 17/23 * 0
= 0
=> 0 * 17/23
Hence verified that a * b = b * a
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Answers & Comments
Step-by-step explanation:
(a) => 11/-15 * -7/6
= -77/-90
= 77/90
=> -7/6 * 11/-15
= -77/-90
= 77/90
(b) => -3/4 * 12/5
= -36/20
=> 12/5 * -3/4
-36/20
(c) => -27/-8 * 1/9
= -27/-72
27/72
=> 1/9 * -27/-8
= -27/-72
= 27/72
(d) => 17/23 * 0
= 0
=> 0 * 17/23
= 0
Hence verified that a * b = b * a