Evaluate without actual multiplication:



(i) 98 x 10square
(ii) (105)square​

2 thoughts on “Evaluate without actual multiplication:<br /><br /><br /><br />(i) 98 x 10square<br /> (ii) (105)square​”

1. Answer:

   101×99=(100+1)(100−1)

   We know suitable identity is (x+y)(x−y)=x

   2

   −y

   2

   Therefore, the value of (100+1)(100−1) is

   =(100)

   2

   −(1)

   2

   =10000−1

   =9999

   Reply

2. Answer:

   (square of 10 ) × 98 = 9800

   (105 ) ² = 1125

   (100 + 5 )²= 100² + 2×100×5 + 5²

   Step-by-step explanation:

   hope it helps

   Reply