## anonymous one year ago will medal question below

1. anonymous

|dw:1434291285071:dw|

2. anonymous

@butterflydreamer

3. butterflydreamer

is the last number a 7 or a 1?

4. anonymous

7

5. CGGURUMANJUNATH

|dw:1434290279530:dw|

6. CGGURUMANJUNATH

|dw:1434290331067:dw|

7. CGGURUMANJUNATH

|dw:1434290365941:dw|

8. butterflydreamer

okay :) You have to use the quadratic formula for this: |dw:1434291441022:dw| From your equation, can you tell me what's a, b and c? Then plug it into the formula :)!

9. butterflydreamer

oops i was too slow LOL

10. anonymous

a=2 b=-3 c=-7

11. CGGURUMANJUNATH

|dw:1434290411013:dw|

12. CGGURUMANJUNATH

|dw:1434290471648:dw|

13. anonymous

in the formula why is b squared 3 and not -3 @butterflydreamer

14. butterflydreamer

b squared? We know b = -3, so b^2 = -3 * -3 = 9 (multiplying two negatives make a positive)

15. anonymous

sorry i meant b

16. anonymous

|dw:1434291775453:dw|

17. anonymous

i thought that would be -3 ?

18. butterflydreamer

ohhhh! okay :) Looking at our formula we have: |dw:1434291773407:dw|

19. anonymous

im talking about the b squared in the formula @butterflydreamer

20. anonymous

it should be -3 cos b is -3

21. butterflydreamer

are you talking about in @CGGURUMANJUNATH 's working? |dw:1434291913118:dw|

22. anonymous

yes

23. CGGURUMANJUNATH

|dw:1434290833150:dw|

24. butterflydreamer

oh yeah, it should be (-3)^2 :) But -3 squared and 3 squared both give you 9... just a typo probably

25. CGGURUMANJUNATH

|dw:1434290844945:dw|

26. CGGURUMANJUNATH

|dw:1434290878100:dw|

27. CGGURUMANJUNATH

|dw:1434290905645:dw|

28. anonymous

ok

29. anonymous

|dw:1434292314596:dw|

30. anonymous

@butterflydreamer

31. butterflydreamer

remember that the entire this is divided by 4 so we actually have: |dw:1434292371847:dw|

32. anonymous

x=-1.3 to 1 dp or x=2.8

33. CGGURUMANJUNATH

|dw:1434291344388:dw||dw:1434291383387:dw|

34. butterflydreamer

that's corrreect :)!

35. anonymous

thanks both @butterflydreamer and @CGGURUMANJUNATH

36. butterflydreamer

you're welcome :))!

37. CGGURUMANJUNATH

|dw:1434291441704:dw|