1.

Expand: (9x-10)2

Answer»

Given (9x-10)2

According to the identity (a – b)2=a2-2ab+bwe have to expand the given expression,

(9x-10)2= (9x)2-2 (9x)(10)+(10)2

(9x-10)2= 81x2-180x+100



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