Question

using suitable identity find the product of (x-7)(x-7)​

Answer 1

Qns – ( x – 7 ) ( x – 7 )

Identity – ( a – b )² = (a)² – 2ab + (b)²

Solution –> ( x – 7 ) ( x – 7 )

= ( x – 7 )²

= (x)² – 2 (x) (7) + (7)²

= x² – 14x + 49