Question

factorise it K^2-81/121​

Answer 1

Answer:

(11k + 9) • (11k - 9)/121        

Step-by-step explanation:

 81 /121    

 (k^2) -  81/ 121

 (k^2) =(k^2)/1 =(k^2)(121)/121  

 (k^2) * 121 - (81)/121   =  121*(k^2) - 81/121

 Factoring:  121*(k^2) - 81  

 Check :  121  is the square of  11  

 Check : 81 is the square of 9

 Check :  k2  is the square of  k1  

Factorization is :       (11k + 9)  •  (11k - 9)

(11k + 9) • (11k - 9)/121      

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Answer 2

Answer:

(k - 9/11) (k + 911)

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