Question

maths subject ok
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Answer 1

81x ^4 - 121x^2

a^2 - b ^2 where a = 9 , b = 11

X ^2 [(9x)^2- 11^2]

a ^2- b ^ 2 = ( a-b)(a+b)

X ^ 2 (9x - 11)(9x+11)


this is your answer...

Answer 2

Answer:

81x ^4 - 121x^2  

a^2 - b ^2 where a = 9 , b = 11  

X ^2 [(9x)^2- 11^2]  

a ^2- b ^ 2 = ( a-b)(a+b)  

X ^ 2 (9x - 11)(9x+11)  

this is your answer..

Step-by-step explanation: