factorise:
x²+1/x²-11
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Answered by
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 ]
Answered by
3
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
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