Question

Using identities, evaluate:
(a) 71power2 (b 153power2 – 147power2 (c) 102power2 (d) 998power2
(e) 297 × 303 (f) 78 × 82 (g) 1.05 × 9.5​

Answer 1

Answer:

71 x 71 = 504 1

Step-by-step explanation:

153^2=22500+900+9

= 23409

297X 303 = (300 - 3)(300+3)

300^2-3^2

= 90000 - 9=89991

78 x 82 = (80-2) (80+2)

= 80^2-2^2

= 6400 - 4

=6396