Question

36. Evaluate 401 402 use identity:
(+a)(4+ b)
** (a+b)x+ ab)​

Answer 1

Answer:

161202.

Explanation:

401 and 402 can be written as 400+1 and 400+2

x=400 a=1 b=2

(x+a)(x+b)=xsquare+(a+b)x+ab

(400+1)(400+2)=400square+(1+2)400+1×2

160000+3×400+2

160000+1200+2

161202.

Answer 2

Answer:

161202

Explanation:

401*402=(400+1) * (400+2)

=400(2) + 400(1+2) +1*2

=160000 + 1200 + 2

= 161202

*Note*= *(abstract) means multiplication sign.

Hope this will help you.

Thank you.❤️