the product of -7ab and 3ab is -7 x 3


The product of -7ab and +3ab is (-7 x 3) a2 b2 = -21a2 b2. In other words, a term with minus sign when multiplied with a term having a positive sign, gives a product having a minus sign 

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Mathematics: the product of -7ab and 3ab is -7 x 3
Reference No:- TGS0159808

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