johndeergurl Group Title plz help explain: 3/x^3/1/x^2 ? I will up load a better picture. 2 years ago 2 years ago

1. johndeergurl

2. mandonut

dividing by 1/x^2 is the same as mutiply the numerator by x^2

3. mandonut

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4. Romero

Wait that is wrong.

5. johndeergurl

I understand that part what I dnt get is do both of my x^2 and x^3 cross out?

6. Romero

$\frac{3}{\frac{x^3}{\frac{1}{x^2}}}=\frac{3}{x^3}\frac{x^2}{1}=\frac{3x^2}{x^3}=\frac{3*x*x}{x*x*x}$

7. Romero

You have two x's on the top and you have three in the bottom right?

8. johndeergurl

yes.

9. Romero

Two from the top cancel two from the bottom

10. Romero

so you are left with zero x's on the top and one x on the bottom

11. Romero

understand?

12. johndeergurl

so it would just be 3x

13. Romero

No I said there will be zero x on the top and one in the bottom of the fraction

14. johndeergurl

3/x

15. Romero

$\frac{3*x*x}{x*x*x}=\frac{3}{x}$

16. Romero

yes you are correct good job

17. johndeergurl

okay thank you. :) you were very helpful.

18. Romero

Sure thing