Question

if x=(√5+√2)/(√5-√2) and y=(√5-√2)/(√5+√2),Find the value of 3x²+4xy-3y²​

Answer 1

Answer:

Answer

Correct option is

A

323

We rationalize the denominator, 

x=5+25−2×5−25−2

x=5−45+4−35

x=19−45.

Then, x2=(9−45)(9−45)

=81+16×5−725

=161−725 .

We rationalize the denominator, 

y=5−25+2×5+25+2

y=

Answer 2

Step by step explanation

Hope this helps