Question

12.1²-7.9² using a²-b²= (a+b) (a-b)


plz answer neatly ​

Answer 1

Step-by-step explanation:

(12.1 + 7.9) (12.1 -7.9)

= (20) (4.2)

=20×4.2

=84

Answer 2

Answer:

here a= 12.1 and b= 7.9

so,

12.1² - 7.9² = (12.1 + 7.9)(12.1 - 7.9)

= (20)(4.2)

= 20×4.2

= 84.0

= 84

please mark me brainlist