Q2 of 59 Page 258

Find the product:

(a−2b + 3c)(ab2−a2b)

Consider the trinomial a−2b + 3c and the binomial ab2−a2b.

Now, to get the product of a−2b + 3c and ab2−a2b,we use the


distributive law i.e. (a−2b + 3c)×( ab2−a2b) = a(ab2-a2b)-2b(ab2-a2b) + 3c(ab2-a2b)


= a2b2-a3b-2ab3 + 2a2b2 + 3ab2c-3a2bc = 3a2b2-a3b-2ab3 + 3ab2c-3a2bc


Therefore , the product of a−2b + 3c and ab2−a2b is 3a2b2-a3b-2ab3 + 3ab2c-3a2bc


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