Hi,

Re: TY, Note: applying only ***** rules governing exponents to this problem: 

Listed others for future reference only.

    | ******

 | Multiplying numerator and denomination by x^11

          |******

Not that You would go thru All this for every problem...

just wanted to show why according to the Rules for Exponents that }



******

******









 

Answer by vleith(2983)   (Show Source): You can put this solution on YOUR website!
  when multiplying powers of the same base, add exponents

  to change the sign of an exponent, move it 'up or down' and change the sign. Here is the math behind that trick

 =

=

 = 

 =

 x^0 is defined as equating to 1

 which is simply 'moving the negative power from the numerator down to the denominator and changing the sign. The same thing can be done to move a negative exponent in the denominator up to the numerator.



Get it?

 

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