Question

factorise:
x²+1/x²-11​

Answer 1

Answer:

Step-by-step explanation:

x² + 1/x² - 11

= x² + 1/x² - 2 - 9

= x² + 1/x² - 2×(x)×(1/x) - 9

[ since, (x)×(1/x) = 1 ]

= ( x - 1/x )² - 3²

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

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Identity Used :

(a + b)² = a² + b² + 2ab [ 2nd step ]

a² - b² = (a + b) (a - b) [ 4th step ]

Answer 2

Answer:

plz like my answer

Step-by-step explanation:

x²+1/x²-2-9

x²+1/x²-2x(multiplr)(1/x)-9

[since = (x) multiple (1/x)=1]

(x-1/x)²-3²

(x-1/x+3)

the answer is (x-1/x-3)

I hop it help full.. thanku