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Mathematics 11 Online
OpenStudy (anonymous):

can you please help!!!!!!!!! (v+1) (v2-v+1) the 2 is an exponent

OpenStudy (anonymous):

seems like you have a sum of cubes, what do you need help with?

jimthompson5910 (jim_thompson5910):

Hint: (v+1)(v^2-v+1) = v(v^2-v+1) + 1(v^2-v+1)

OpenStudy (anonymous):

how do you solve it and what is the problem even called. My teacher does not help at all

jimthompson5910 (jim_thompson5910):

What happens when you distribute v(v^2-v+1) ?

OpenStudy (anonymous):

you multiply them?

jimthompson5910 (jim_thompson5910):

yes, v*v^2 - v*v + v*1

OpenStudy (anonymous):

so whats the answer?

jimthompson5910 (jim_thompson5910):

tell me what you get and I'll confirm it for you

OpenStudy (anonymous):

ahh i dont know.... you do V times v2?

jimthompson5910 (jim_thompson5910):

yes, which gives you what?

OpenStudy (anonymous):

v3-v2+v?

jimthompson5910 (jim_thompson5910):

you got it

jimthompson5910 (jim_thompson5910):

that's just part of the answer though

jimthompson5910 (jim_thompson5910):

Now distribute 1(v^2-v+1)

OpenStudy (anonymous):

v2-v+1?

jimthompson5910 (jim_thompson5910):

you got it

jimthompson5910 (jim_thompson5910):

so v(v^2-v+1) + 1(v^2-v+1) becomes v^3 - v^2 + v + v^2 - v + 1

jimthompson5910 (jim_thompson5910):

To finish off, combine like terms

OpenStudy (anonymous):

v3-v2+v v2-v +1 answer: v3+v+1?

jimthompson5910 (jim_thompson5910):

close

jimthompson5910 (jim_thompson5910):

notice we have a +v and a -v

OpenStudy (anonymous):

so its a -v

jimthompson5910 (jim_thompson5910):

what is v-v ?

OpenStudy (anonymous):

0

jimthompson5910 (jim_thompson5910):

yes, so the v terms basically go away

OpenStudy (anonymous):

so v3+1 is the answer?

jimthompson5910 (jim_thompson5910):

yes

OpenStudy (anonymous):

thank you soooooooo much!!!!!!!!!!!!!!

jimthompson5910 (jim_thompson5910):

you're welcome

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