Question

Using identity, evaluate the following (198)^2​

Answer 1

Answer:

✅Here's your answer

#By (a-b) ^2=(a) ^2 + (b) ^2 -2ab

#So

$(200 - 2) ^{2} = {200}^{2} + {2}^{2} - 2 \times 200 \\ \times 2 \\ \\ = 40000 + 4 - 800 \\ \\ = 40004 - 800 \\ \\ = 39204$

Hope it helps ✌

Answer 2

$= {(200 - 2)}^{2}$

Using Identity, (a-b)^2 = a^2-2ab+b^2

=

${200}^{2} - (2)(200)(2) + {2}^{2}$

$= 40000 - 800 + 4$

$= 40000 - 796$

$= 39204$