Question

using indenty slove. (998)2

Answer 1

(998)²=(1000-2)²
We know that (a-b)²=a²-2ab+b²
Here,a=1000,b=2
(1000-2)²=(1000)²-2(1000)(2)+2²
⇒1000000-4000+4
⇒996004.
Therefore,(998)²=996004 .

Answer 2

Answer:

(998)²

(a-b)²=a²-2ab+b²

=(1000-2)²

=(1000)²-2*1000*2+2²

⇒1000000-4000+4

⇒996004.

(998)²=996004 .