## hba Group Title If x^2-36>0,what are the possible values of x ? one year ago one year ago

1. hba Group Title

x^2>36 $x \ge \pm6$

2. hba Group Title

Options provided, A) x > 6 B) x < 6 C) x > -6 D) x <-6 or x >6

3. hba Group Title

@Rosh007 Yes ?

4. hba Group Title

5. hba Group Title

So x > +- 6

6. Otonashi Group Title

D

7. hba Group Title

Please check out the CoC-http://openstudy.com/code-of-conduct @Otonashi

8. Rosh007 Group Title

mmmm... I am not sure about how it comes.. since it is inequality... have to refresh.. my memory...

9. hba Group Title

10. tamtoan Group Title

if you want to solve, try factor the x^2 - 36 ...and what condition make the product of 2 factors greater than zero ?...try that, you should come out with the right answer

11. hba Group Title

12. tamtoan Group Title

solving for you is not the right way to help you understand at all :)

13. Rosh007 Group Title

but a method is there.... not by mathematical.. but by anaysis... you will b able to understand

14. nubeer Group Title

hmm honestly.. i dont remmeber how but option is D. u can say its trick the way i rmemeber when x<+-a then sol is -a<x<a when x>+-a then sol is x<-a and x>a

15. hba Group Title

16. Rosh007 Group Title

it is best suited for inequality

17. hba Group Title

what will i do of the answer lol :D

18. hba Group Title

@Rosh007 Well it is fun to revise things back after 2 years,Rusted brains lol.

19. tamtoan Group Title

did you try factoring x^2 - 36 ? what are the 2 factors ?

20. hba Group Title

|dw:1353051849999:dw| Lets talk about the graph which makes me help understanding it.

21. Rosh007 Group Title

@ha ha.... :)... by analyais it is a lot simpler... and may able to form mathematics from analysis too ;)

22. hba Group Title

Well i got it x >6 or x < -6

23. hba Group Title

The possible solutions . Thanks alot anyways.

24. Rosh007 Group Title

:)

25. Rosh007 Group Title

I wish I could give a best response to hba too... :(

26. hba Group Title

@Rosh007 give it to @tamtoan

27. tamtoan Group Title

rosh, (x-6)(x+6) > 0 ....this can only happen when both factors are possitive or both are negative

28. Rosh007 Group Title

@hba yup.. I had given....... @tamtoan sure thanks I figured out..... & that is what hba got by analysis