1.

Find the products: (2x-3y) (2x-3y)

Answer»

Given (2x-3y) (2x-3y)

But we can write the given expression as (2x – 3y) (2x -3y) = (2x – 3y)2

But we have (a – b)2=a2-2ab+b2

On applying above identity in the given expression we get,

(2x – 3y)2= 4x2-2 (2x) (3y) + 9y2

(2x – 3y)2= 4x2-12 xy + 9y2


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