1.

Use suitable identities to find the products of (x – 5) (x – 5)

Answer»

(x – 5) (x – 5) 

= (x – 5)2 = x2 – 2(x) (5) + 52 

[ ∵(x – y)2 = x2 – 2xy + y2

= x2 – 10x + 25



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