Question

using suitable identities evaluate the following​

Answer 1

(a) (93)2 = 93 × 93 = 8649

(e) (10.1)2 = 10.1 × 10.1 = 102.01

(i) (12.5)2 - (7.5)2 = 12.5×12.5 - 7.5×7.5

= 156.25 - 56.25

= 100

(m) 12.5 × 10.5 = 131.25

(b) (103)2 = 103 × 103 = 10609

(f) (8.6)2 = 8.6 × 8.6 = 73.96

(j) (10.2)2 - (9.8)2 = 10.2 × 10.2 - 9.8 × 9.8

= 104.04 - 96.04

= 8

(n) 997 × 1007 = 1003979

Hope it helps you.

Please thank me.