1. AnimalAin

Difference of squares. \[a^2-b^2=(a+b)(a-b) \]

2. KE8717504

Ok so what would that make the binomials?

3. KE8717504

I just hate binomials i can't ever get them.

4. lgbasallote

a+ b <---first binomial a - b<---second binomial just substitue a and b to the right values

5. KE8717504

Yes that's what I am having trouble finding though. Because the question states write 2 binomials whose product is x squared - 25

6. KE8717504

I have no clue, i know that sounds stupid

7. KE8717504

I just hate doing math anyways so it's confusing to me even when i do binomials.

8. lgbasallote

okay here's a hint \[a^2 - b^2 \implies (a+b)(a-b)\] so \[x^2 - 4 \implies (x + 2)(x-2)\] \[x^2 - 9 \implies (x+3)(x-3)\] \[x^2 - 16 \implies (x+4)(x-4)\] are you getting it now?

9. KE8717504

so a bionomial for x squared -25 could be (x+5)?

10. lgbasallote

yes that's one of the binomials...what's the other?

11. KE8717504

would it be (x-5)?

12. lgbasallote

yes. the binomials for x^2 - 25 is (x+5)(x-5) congrats

13. KE8717504

well see when i typed that in my program on my computer i have to do this math on it said it was incorrect

14. lgbasallote

that's why i hate those computers lol. so picky

15. lgbasallote

try putting them in one by one

16. KE8717504

i did i tried the x + 5 first

17. lgbasallote

shouldnt make a difference but...try putting x-5 first?

18. KE8717504

Should I put the ( ) or not?

19. KE8717504

and it says type your answer in factor form so what would that be

20. lgbasallote

(x+5)(x-5)

21. lgbasallote

^factor form

22. KE8717504

so the (x+5)(x-5) is factor form?

23. lgbasallote

yes (x+5)(x-5) is factor form...

24. KE8717504

can i ask you another math question

25. lgbasallote

sure

26. KE8717504

The number of ways a teacher can award different prizes to 2 students in class having n students is given by the formula p(n)=n(n-1)

27. KE8717504

use this formula to determeine the number of ways a teacher can award different prizes to 2 students in a class having 6 students

28. lgbasallote

substitute 6 into n in the formula

29. KE8717504

then it says to rewrite the formula by multiplying the factors

30. lgbasallote

yes. substitute 6 into n in the formula...

31. KE8717504

ok so the formula would be P(6)=6(6-1)?

32. lgbasallote

yes

33. KE8717504

just a couple more questions i promise

34. KE8717504

when i tried typing that the other way it said multiply the two factors of the expression for p(n) given in the problem statement to write the expression in a different way

35. lgbasallote

i dont get what you're asking

36. KE8717504

It's just saying to rewrite the formula in a different way

37. KE8717504

by multiplying the factors

38. lgbasallote

just substitute 6 into n...isnt that what you did?

39. KE8717504

Yea i did that for the first answer but it's not right for the second one

40. lgbasallote

now multiply

41. lgbasallote

simplify it

42. KE8717504

so the answer would be 30 right that simplified

43. KE8717504

but that's not the formula

44. KE8717504

can i give u my math xl login info and let you look at it?

45. lgbasallote

the formula is what you wrote first

46. lgbasallote

the simplified is the second answer

47. KE8717504

So the first formula was p(n)=n(n-1) then it was P(6)=6(6-1) then it was P(6)=6(5) and then P(6)=30

48. lgbasallote

yes

49. KE8717504

But when it said to multiply factors and write the formula over I have no idea

50. lgbasallote

multiply the factors means you multiply the factors <--that will give you 30 write the formula over is just copying the formula but substitute 6

51. KE8717504

ok so my answer box already has P(N)= so i need to put 6 X 5

52. lgbasallote

if the start is p(n) = then you rewrite the formula... n(n-1)

53. KE8717504

omg it said it wasn't in correct form that time but it was correct

54. lgbasallote

lol. these computers are confusing me now o.O

55. KE8717504

I know right I don't know how to put it

56. lgbasallote

me neither.

57. lgbasallote

58. lgbasallote

i have to go now so i wish you luck that you finish this

59. KE8717504

thanks soooo much for your help

60. lgbasallote

welcome