Question

If x-1/x=1/3 , find the value of x^3-1/x^3 .

Answer 1

Answer:

Step-by-step explanation:

2x-3y=-1 3x+5y=5

2x-3y=-1   en1 *5

3x+5y=5  en2 *3

10x-15y=-5  en3

6x+15y=15 en4

  add en3 +en4

        10x-15y=-5  en3

  +     6x+15y=15 en4

         16x      = -15

       x  16-15 =1

       x=1

      put x= 1  in en 1

         2x-3y=-1

         2[1]-3y=-1

         2-3y=-1

          -3y=2-1=1

          y=-3-1

         y=4

Answer 2

Answer:

answer is 28÷27

Step-by-step explanation:

square it and put the identity