saifoo.khan 4 years ago Whoz Gonna Chk this??

1. giggles123

Moi

2. saifoo.khan

3. giggles123

working on it give me a sec

4. saifoo.khan

Sure, :)

5. giggles123

sqrt(3a)+16asqrt(3a)===>17sqrt(3a)

6. giggles123

there is no xtra A

7. saifoo.khan

why? where does it goes?

8. giggles123

sqrt(3a)+8sqrt(12a^(3)) Pull all perfect square roots out from under the radical. In this case, remove the 2a because it is a perfect square. sqrt(3a)+(8*2asqrt(3a)) Multiply 8 by 2a to get 16a. sqrt(3a)+(16a)sqrt(3a) Remove the parentheses around the expression 16a. sqrt(3a)+16asqrt(3a)

9. Hero

10. Hero

and the way it should be written...

11. Hero

the a goes before the root not after it

12. saifoo.khan

the answer is $\Huge \sqrt{3a}(16a+1)$

13. Hero

I don't disagree

14. giggles123

its the same thing in a different form

15. saifoo.khan

No, tht isnt same!

16. Hero

Whose online test are you taking this time?

17. saifoo.khan

there is a extra 'a'

18. saifoo.khan

someone's ;)

19. Hero

There's no extra a dummy

20. Hero

I mean guru

21. Hero

the right amount of a's are there

22. Hero

so if it's the right answer, there could never be an extra a, if there was it would be one a too many and it would be wrong

23. saifoo.khan

in the photo u can see, its 16root(3a) a. because of that last a, u cant add them!

24. Hero

Yes, you're right, you can't add them...so factoring out the sqrt(3a) was a good step....

25. saifoo.khan

hmmm! :(