1. TBQ - Evaluate the following

Calculate the following using Brahmagupta’s laws:
 
(i) \((-13) × 3 =\)
 
(ii) \((-9) × (-6) =\)
 
(iii) \(0 – (-19) = \)
 
(iv) \((-18) ÷ 2 = \)
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