Question

1. Using suitable identities, evalu
(1) 105 x 105
(iv) 97 x 98
2. Using suitable identities, evalu
(i) (98)​

Answer 1

1)

(a+b)(a-b) =a2-b2

(100+5)(100-5)

100^2-5^2

10000-25

9975

2)

98

(100-2)^2

100^2-2^2

10000-4

=9996