Math, asked by shivangijha186, 3 months ago

if x=3+3√5, then x²+1/x² = ?


shivangijha186: yr pls just help me once
HeartlessgirlLeiah: I try..LOL

Answers

Answered by HeartlessgirlLeiah
8

Answer:

x²+1/x² = 11

Step-by-step explanation:

Given

x-1/x = 3---(1)

On Squaring equation (1), we get

=> (x-1/x)² = 3²

=> x²+1/x²-2*x*(1/x) = 9

/* By algebraic identity :

(a-b)² = a²+b²-2ab */

=> x²+1/x² - 2 = 9

=> x² + 1/x² = 9 +2

=> x² + 1/x² = 11

Therefore,

x²+1/x² = 11

••••

Attachments:
Answered by sweetsoul77
1

Answer:

IDK

Step-by-step explanation:

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