Question

Explain if :

Answer 1

\[x = 9 - 4 \sqrt{5}, find \ the \ value \ of \ \ x^2 + \frac { 1 }{ { x }^{ 2 } } \]

Answer 2

@Callisto

Answer 3

@Hero

Answer 4

help

Answer 5

@\\@Hally canu

Answer 6

@vbfn

Answer 7

@vbfn help

Answer 8

plzz help

Answer 9

\[x=9-4\sqrt{5}\] then what is x^2?

Answer 10

x^2=9*9-4*4*5 since sqrt5*squrt5=5

Answer 11

x^2=81-90=9

Answer 12

x^2+(1/x^2)= 9+(1/9)
and I'm sure you can do that.

Answer 13

thanks fr u r help

Answer 14

Is the answer 82/9

Answer 15

@vbfn

Answer 16

yes!