Answer :

2.3a5b2 × 1.2a2b2

= 2.3 × 1.2 × a5 × a2 × b2 × b2


= 2.76 × a7 × b4


= 2.76a7b4


Verification:


a = 1 and b = 0.5


2.76 a7 b4 = 2.76 (1)7 (0.5)4


= 2.76 × 1 × 0.0025


= 0.1725


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