Question

if x=4-√15 find √x+(1/√x)​

Answer 1

Step-by-step explanation:

x= 4-√15

1/x=1/4-√15

=1/4-√15 × 4+√15/4+√15

=4+√15/4²-(√15)²

=4+√15/16-15

=4+√15/1

=4+√15

x+1/x = (4-√15) + (4+√15)

=4-√15 + 4 + √15

=8

Hence, (x+1/x)²

=8²

=64