Question

a+b=15,ab=54,1/a +1/b?​

Answer 1

Answer:

from which class are you ?

Answer 2

Answer:

( = (a+b)^2 - 4ab

= (15)^2 - 4×54

= 225 - 216

= 9

so, (a-b) = 3

now,

a+b= 15

a-b= 3

________________

2a = 18

so, a = 9

and b= 6

Now, a+1/b = 9 + 1/6

=( 54+1)/6

= 55/6

ans: 55/6