Question

a^2+ 1/a^2=243 Find a+1/a​

Answer 1

Answer:

The ISI mark is by far the most recognised certification mark in the Indian subcontinent. The ISI is an initialism of Indian Standards Institution, the name of the national standards body until 1 January 1987, when it was renamed to the Bureau of Indian Standards.

Answer 2

3(y - 7) - 2(7y - 4) = (3 - 5y)

3y - 21 - 14y + 8 = 3 - 5y

3y - 14y + 5y = 3 + 21 - 8

- 11y + 5y = 24 - 8

- 6y = 16

- y = 16/6

- y = 8/3

y = - 8/3