## anonymous one year ago Evaluate a^2 + b for a = 1/2 and b = -1/2. -1/2 -1/4 0 1/2

1. anonymous

@muscrat123

2. anonymous

hang on- rr break

3. anonymous

okay

4. anonymous

okay

5. anonymous

i got a or b

6. anonymous

y do u say that?

7. anonymous

say what?

8. anonymous

a or b

9. anonymous

because google calculator doesnt have a fraction option so i did it in decimal and got -0.25

10. anonymous

lol. dont use calculators yet

11. anonymous

haha oh

12. anonymous

|dw:1436487068293:dw|

13. anonymous

.5 ^2 = ?

14. anonymous

25

15. anonymous

nope

16. anonymous

0.25

17. anonymous

yes

18. anonymous

oh okay

19. anonymous

then do ...25 + (-....5)

20. anonymous

20?

21. anonymous

no for 2 reasons not in decimal form and wrong answer and also not correct sign

22. anonymous

oh

23. anonymous

fix?

24. anonymous

OK would it just b easier if i gave u the answer or do u want me to explain

25. anonymous

26. anonymous

ok. im perfectly fine w that. i ask bc most of the time when i explain, the person doesnt care and they rnt paying attn

27. anonymous

well i no i need to learn this stuff to graduate so i try and understand

28. anonymous

*do

29. anonymous

i understand fully. what is the next ?

30. anonymous

i dont understand the little number thing

31. anonymous

?

32. anonymous

little #?

33. anonymous

$x^{2}$

34. anonymous

exponents?

35. anonymous

that 2 for example i dont no what to do with those

36. anonymous

yea i that

37. anonymous

when there is a # raised like that, it means to multiply the base the amount of times the exponent says|dw:1436488082351:dw|

38. anonymous

lets practice

39. anonymous

|dw:1436488171999:dw|

40. anonymous

okay would that be 4 times 2 or 4 times 4 thats what confuses me

41. anonymous

$4^{2}=what?$

42. anonymous

if u multiply the base times itself the exponents many times, what do u think

43. anonymous

16?

44. anonymous

|dw:1436488302990:dw|

45. anonymous

so yes

46. anonymous

lets try 2 more

47. anonymous

okay

48. anonymous

|dw:1436488352735:dw|

49. anonymous

$8^{4}=what?$

50. anonymous

top one is 4096 other is 216

51. anonymous

correct!! now lets try an example of adding, subtracting, multiplying and dividing with exponents

52. anonymous

okay

53. anonymous

we probably wont get to x and / tho

54. anonymous

|dw:1436488597206:dw|

55. anonymous

844279

56. anonymous

did u use a calculator?

57. anonymous

b honest

58. anonymous

yes

59. anonymous

i cant mutiply right of the top of my head

60. anonymous

no words

61. anonymous

use paper!!!

62. anonymous

i havent used a calculator yet and im in 7th grade.

63. anonymous

how do you no this stuff then?

64. anonymous

bc i take college level classes

65. anonymous

ive known this stuff since 3rd grade i believe

66. anonymous

wow

67. anonymous

since u used a calculator, lets try another one, but ill make it easier. USE PAPER!

68. anonymous

haha okay

69. anonymous

|dw:1436488985874:dw|

70. anonymous

$3\times3\times3 = 27$

71. anonymous

then $4\times4\times4\times4\times4$

72. anonymous

73. anonymous

1024

74. anonymous

that doesnt look right

75. anonymous

it would be 3 x 3 x 3 + 4 x 4 x 4 x 4 x 4 = ? and i believe u are correct, but only for 4^5

76. anonymous

when u c this 4^5 ^^^^ it means it is an exponent in case u didnt know

77. anonymous

i no that

78. anonymous

its 27 because 3+3+3 is nine then 9 times 3 is 27

79. anonymous

yes. 1024 + 27 = final answer

80. anonymous

and u used PAPER right?