Question

if a equals to 2 + root 3 find a minus 1 by a​

Answer 1

Answer:

Given a=2+root3

=> (1/a)= 1/(2+root3)

Multiply and divide by (2-root3)

=> (1/a)= (2-root3)/[(2+root3)(2-root3)]

=> (1/a)= (2-root3)/[4-3]

=> (1/a)= (2-root3)

=> a+(1/a) = (2+root3)+(2-root3)

=4 this is your answer.

Answer 2

Refer the attachment..

Hope it helps you..