## InsanelyChaotic 2 years ago Rationalize the denominator 5 ________________ (6-4sq root 7) - (8-5sq root 7)

1. hartnn

what have u tried ?

2. RolyPoly

First, simplify the denominator: $(6-4\sqrt7) - (8-5\sqrt7)$ Add the like terms.

3. Kelumptus

There is no denominator....

4. InsanelyChaotic

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5. slaaibak

@Kelumptus there is. it's 5 / radical

6. InsanelyChaotic

wow you're telling me all of you guys like math????

7. RolyPoly

@Kelumptus The fraction is $\frac{5}{(6-4\sqrt7) - (8-5\sqrt7)}$

8. Kelumptus

Ahhh... i missed the 5 in the question, cheers.

9. InsanelyChaotic

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10. hartnn

what ?

11. InsanelyChaotic

Really?!!!!!!!!!!!!!!!! I'm RIGHT?!!!!!!!!!!!!!!!!!!!!

12. InsanelyChaotic

Nothing, disregard what's above

13. hartnn

yeah, the previous answer was correct...

14. hartnn

or were you typing options ? :P

15. InsanelyChaotic

I didn't mean to send the one above. thank god!

16. InsanelyChaotic

It was work i was doing on my own haha that "post" button is clicking itself eh? ;) jk

17. hartnn

oh, wait...you sure there is no sign mistake ?

18. InsanelyChaotic

19. hartnn

20. InsanelyChaotic

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21. slaaibak

${5 \over -2 + \sqrt 7} = { {5 \over -2 + \sqrt 7} \times {-2 - \sqrt 7 \over -2 - \sqrt 7}} = { {10 + 5\sqrt 7} \over {3}}$

22. hartnn

yup. thats absolutely correct, just checking that you were sure or not ......

23. slaaibak

hartnn that's not correct.

24. hartnn

O.o

25. InsanelyChaotic

HUH?

26. slaaibak

Check my answer for the correct thing.

27. hartnn

oh, yes, slaaibak is right, you missed a 5, @InsanelyChaotic

28. InsanelyChaotic

Oh did I???? my error

29. InsanelyChaotic

thank you for the heads up!

30. InsanelyChaotic

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31. hartnn

yup.