Question

x=9-4√5 find √x-1\√x

dind it

Answer 1

Answer:

x=4

Step-by-step explanation:

x=9-4rt5

therefore,rtx=rt(9-4rt5)

now,(9-4rt5) is a square of (2-rt5)

so,rtx=rt(2-rt5)^2

or,rtx=(2-rt5)......(i)

the expression:

rtx-1/rtx

or,(2-rt5)-1/(2-rt5)....from (i)

or,(9-4rt5-1)/(2-rt5)

or,(8-4rt5)/(2-rt5)

or,4(2-rt5)/(2-rt5)

or,4