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Mathematics 16 Online
OpenStudy (jazzyfa30):

help plzz

OpenStudy (jazzyfa30):

OpenStudy (jazzyfa30):

@ganeshie8 hey havent been here in a while can you help

OpenStudy (jazzyfa30):

@phi

OpenStudy (phi):

any idea what they mean by "cube" -5 ?

OpenStudy (jazzyfa30):

-5^3 i think

OpenStudy (phi):

yes, but I would write it (-5)^3 just to make sure we know we want -5* -5 * -5 (and not - 5*5*5 which gives the right answer, but sometimes it won't)

OpenStudy (phi):

subtract that expression from -8 to do that, I pick a simpler problem subtract 1 from 3 can you do that ?

OpenStudy (jazzyfa30):

2

OpenStudy (phi):

yes, but how did you get 2 ?

OpenStudy (jazzyfa30):

ohh is it -2

OpenStudy (phi):

you did it correctly the first time. but I want you to write down how you found 2 for the answer to subtract 1 from 3

OpenStudy (jazzyfa30):

|dw:1440532728101:dw|

OpenStudy (phi):

take away 1 from 3 ? how do you do that ?

OpenStudy (jazzyfa30):

yu subtract

OpenStudy (phi):

yes, but write down how to do it take away 1 from 3

OpenStudy (phi):

subtract 1 from 3 or take away 1 from 3 means do 3-1

OpenStudy (phi):

the point is to get clear what they mean by subtract that expression from -8 that means -8 - expression where expression is (-5)^3 -8 - (-5)^3

OpenStudy (jazzyfa30):

117

OpenStudy (phi):

-8 - (-5*-5*-5) -5*-5 is 25. 25*-5= -125 -8 - -125 = -8 + 125 = 117 yes

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