Ask
your own question, for FREE!

Mathematics
59 Online

OpenStudy (anonymous):

why doesnt x^3-8=(x-2)^3??? please reply!

Still Need Help?

Join the QuestionCove community and study together with friends!

OpenStudy (amistre64):

becasue they are 2 different operations

OpenStudy (amistre64):

exponents are(nt) distributive across addition

OpenStudy (anonymous):

In one you are cubing the x and subtracting the 8. In the other you are subtracting the 2 then cubing it. On a side not: I WANNA BE A MOD AMISTRE!!!

OpenStudy (anonymous):

because (x-2)^3 is like (x-2)(x-2)(x-2)

OpenStudy (anonymous):

so, it doesn't equal the same as x^3-8

Still Need Help?

Join the QuestionCove community and study together with friends!

OpenStudy (anonymous):

AMISTRE!!! D: My lip is poking out :(

OpenStudy (anonymous):

Multiply out \[(x-2)^3\] and you will see that the answer is not \[x^3-8\]

OpenStudy (anonymous):

In general: \[(a+b)^n \neq a^n+b^n\]

OpenStudy (anonymous):

but how would u know it is (x-2)(x^2+2x+4)

OpenStudy (anonymous):

We agree that 2^3=2*2*2? So: (x-2)^3=(x-2)(x-2)(x-2) So you can get: (x-2)(x^2+2x+4)

Still Need Help?

Join the QuestionCove community and study together with friends!

OpenStudy (anonymous):

ohhh i understand thanks so muh guys!

Can't find your answer?
Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!

Join our real-time social learning platform and learn together with your friends!

Latest Questions

0bviouslyNotRakita:
are there any shows/movie requests you guys have seen on Netflix? i've been wanting to watch something for a while.

2 hours ago
17 Replies
0 Medals

rose12345:
A plant can have either tall (T) stems or short (t) stems. Two plants are crossed.

2 hours ago
2 Replies
1 Medal

rose12345:
Why are there two sets of phases during meiosis, but only one during mitosis?

3 hours ago
2 Replies
1 Medal