Question

Using formula evaluate (198)

Answer 1

(200-2)sq............

Answer 2

HøLÂ ...❤️✌️

__________________

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

____________

Thanks