Question

evaluate 9.8 ×9.8 - 6.3×6.3/3.5​

Answer 1

Answer:84.7

Step-by-step explanation: below

#be brainly

Answer 2

Answer:

16.1

Step-by-step explanation:

(9.8 )^2 - (6.3)^2/3.5

[(9.8 ) - (6.3)] [(9.8 )+(6.3)]/ 3.5

(3.5)(16.1)/3.5

= 16.1

Note

1) use (a^2-b^2) identity