## 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. muscrat123

hang on- rr break

3. anonymous

okay

4. muscrat123

okay

5. anonymous

i got a or b

6. muscrat123

y do u say that?

7. anonymous

say what?

8. muscrat123

a or b

9. anonymous

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

10. muscrat123

lol. dont use calculators yet

11. anonymous

haha oh

12. muscrat123

|dw:1436487068293:dw|

13. muscrat123

.5 ^2 = ?

14. anonymous

25

15. muscrat123

nope

16. anonymous

0.25

17. muscrat123

yes

18. anonymous

oh okay

19. muscrat123

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

20. anonymous

20?

21. muscrat123

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

22. anonymous

oh

23. muscrat123

fix?

24. muscrat123

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

25. anonymous

26. muscrat123

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. muscrat123

i understand fully. what is the next ?

30. anonymous

i dont understand the little number thing

31. muscrat123

?

32. muscrat123

little #?

33. anonymous

$x^{2}$

34. muscrat123

exponents?

35. anonymous

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

36. anonymous

yea i that

37. muscrat123

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

38. muscrat123

lets practice

39. muscrat123

|dw:1436488171999:dw|

40. anonymous

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

41. muscrat123

$4^{2}=what?$

42. muscrat123

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

43. anonymous

16?

44. muscrat123

|dw:1436488302990:dw|

45. muscrat123

so yes

46. muscrat123

lets try 2 more

47. anonymous

okay

48. muscrat123

|dw:1436488352735:dw|

49. muscrat123

$8^{4}=what?$

50. anonymous

top one is 4096 other is 216

51. muscrat123

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

52. anonymous

okay

53. muscrat123

we probably wont get to x and / tho

54. muscrat123

|dw:1436488597206:dw|

55. anonymous

844279

56. muscrat123

did u use a calculator?

57. muscrat123

b honest

58. anonymous

yes

59. anonymous

i cant mutiply right of the top of my head

60. muscrat123

no words

61. muscrat123

use paper!!!

62. muscrat123

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

63. anonymous

how do you no this stuff then?

64. muscrat123

bc i take college level classes

65. muscrat123

ive known this stuff since 3rd grade i believe

66. anonymous

wow

67. muscrat123

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

68. anonymous

haha okay

69. muscrat123

|dw:1436488985874:dw|

70. anonymous

$3\times3\times3 = 27$

71. anonymous

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

72. muscrat123

73. anonymous

1024

74. anonymous

that doesnt look right

75. muscrat123

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. muscrat123

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. muscrat123

yes. 1024 + 27 = final answer

80. muscrat123

and u used PAPER right?