Question

Evaluate without actual multiplication:



(i) 98 x 10square
(ii) (105)square​

Answer 1

Answer:

(square of 10 ) × 98 = 9800

(105 ) ² = 1125

(100 + 5 )²= 100² + 2×100×5 + 5²

Step-by-step explanation:

hope it helps

Answer 2

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