Question

evaluate using (a-b) (a-b) this identity solve this (198) (198)​

Answer 1

$\huge\bf\green{Hey\:Mate!!!}$

$(198)(198) \\ (200 - 2)(200 - 2) \\ {(200 - 2)}^{2} \\ using \: identity \\ {(a - b)}^{2} = {a}^{2} - 2ab + {b}^{2} \\ {(200)}^{2} - 2(200)(2) + {(2)}^{2} \\ 40000 - 800 + 4 \\ 39204$

Hope it helps uh ✒️

Answer 2

Evaluate the square of 198:

198^2

= (200-2)^2

= 200^2 -2 * 200 * 2 + 2^2

= 40000 - 800 +4

= 32004

Hope this helps!