## anonymous 5 years ago \left( 3sqrt{10+4} \right)\left( 4sqrt{10-5} \right)

1. anonymous

$\left( 3\sqrt{10+4} \right)\left( 4\sqrt{10-5} \right)$ simplify in radical expression.

2. myininaya

3*4=12 10+4=14 10-5=5 14(5)=70 $12\sqrt{70}$

3. anonymous

4. myininaya

5. myininaya

are you sure you type the question in correctly?

6. anonymous

yes i am sure.

7. myininaya

you are entering this into like a online quiz?

8. anonymous

it has to simplified into radical form.

9. anonymous

No, it's online hw.

10. anonymous

It's the only one I can't get.

11. anonymous

Would you like me to show you the practice question? and give you the answer?

12. myininaya

you can if you want, but the above cannot be simplfied anymore since 70=2*5*7 there are no perfect squares in 70

13. anonymous

$\left( 2\sqrt{6+3} \right) \left( 3\sqrt{6-4} \right)$

14. myininaya

2(3)=6 6+3=9 6-4=2 6(3)sqrt(2) =18sqrt(2)

15. anonymous

answer is 24+$24+\sqrt{6}$

16. anonymous

Haha that's the answer it's giving me.

17. myininaya

24+sqrt(6)?

18. anonymous

Lol yea

19. myininaya

so this is multiplication right? not addition or subtraction or division? it is definitely multplication, right?

20. anonymous

multiplication for sure.

21. myininaya

22. myininaya

there has to be a mistake or something

23. anonymous

It's annoying me. I always get 100% on the hw. Except for this one.

24. anonymous

It's due by midnight

25. myininaya

you have class tomorrow?

26. myininaya

does it show you how to work the problem, jason?

27. myininaya

if it does, we can try to follow the logic of the problem they did and see if we can get the answer they are looking for even though it will not be correct

28. anonymous

yea, but with weird examples that don't relate to it.

29. anonymous

Hold on, lemme get that for you.

30. anonymous

$\left( \sqrt{5} +\sqrt{2}\right) \left( \sqrt{2} +3\right)$

31. myininaya

sqrt(5)sqrt(2)+sqrt(5)*3+sqrt(5)sqrt(2)+sqrt(2)3 =sqrt(10)+3sqrt(5)+sqrt(10)+2sqrt(2) =2sqrt(10)+3sqrt(5)+2sqrt(2)

32. anonymous

answer is: $\sqrt{10} +3\sqrt{5} + 2 + 3\sqrt{2}$

33. myininaya

yes i made a mistke up there one sec

34. myininaya

sqrt(5)sqrt(2)+sqrt(5)3+sqrt(2)sqrt(2)+3sqrt(2) =sqrt(10)+3sqrt(5)+3sqrt(2)+2

35. myininaya

so maybe our problem was suppose to look like this

36. anonymous

What seems to be the problem then? :/

37. anonymous

On that practice question, I don't get how they got 24 +(sqrt)6

38. myininaya

ok lets pretend the problem was 3(sqrt(10)+4)2(sqrt(10)-5) 6(sqrt(10)+4)(sqrt(10)-5) 6(10-5sqrt(10)+4sqrt(10)-20) 60-sqrt(10)-20 40-sqrt(10 so this doesn't work

39. myininaya

so what did it say we are suppose to get?

40. anonymous

blank + (sqrt) blank

41. myininaya

ok let's look at that second one and see if we can get they got by making a problem sortof like but in the form of the example you gave

42. anonymous

the answer to that second one was 24+(sqrt)6

43. myininaya

omg i figured out the problem they meant

44. anonymous

....? :]

45. myininaya

so they have (2sqrt(6)+3)(3sqrt(6)-4)=24+sqrt(6)

46. anonymous

yea, how did you get that?

47. myininaya

okay try to entrt 100+srt(10)

48. anonymous

OMG!

49. anonymous

50. myininaya

lol this is the problem they meant: (3sqrt(10)+4)(4sqrt(10)-5)

51. anonymous

ohhhhh my god. really? I didn't even see that. I'm sorry.

52. myininaya

how could you see it when it was written wrong or in the homework wrong

53. myininaya

you should totally tell your teacher of this mistake

54. anonymous

Thank you so much for the help, and I will do that. I have a quiz tmrw.

55. myininaya

do you understand how i got the answers? i don't expect you to understand how i was able to make the problem correct lol