Question

Please tell the answer fast......it is really urgent......i will thank you and mark as brainliest also.....if you give the correct answer......plzzz answer fast​

Answer 1

Answer:

1/x =2/3+√5

= 2/3+√5  x 3-√5/3-√5

= 2 x(3-√5)/(3)²-(√5)²

= 2(3-√5)/ 9-5

= 2(3-√5)/4

= 3-√5/2

x + 1/x = [3+√5+3-√5]/2

= 6/2

=3

x+1/x =3

(x+1/x)²=3²

= x² + 1/x² + 2 =9

= x² + 1/x² = 7

so x³+1/x³ = (x+1/x)(x² -x.1/x + (1/x)²)

x³ + 1/x³ = 3(x²+1/x² -1)

= 3(7-1)

= 3 x 6

18

Brainliest plz.

Step-by-step explanation:

Answer 2

see Image it's your answer.

please mark this answer as brainliest.