Ask
your own question, for FREE!
Mathematics
16 Online
why doesnt x^3-8=(x-2)^3??? please reply!
Still Need Help?
Join the QuestionCove community and study together with friends!
becasue they are 2 different operations
exponents are(nt) distributive across addition
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!!!
because (x-2)^3 is like (x-2)(x-2)(x-2)
so, it doesn't equal the same as x^3-8
Still Need Help?
Join the QuestionCove community and study together with friends!
AMISTRE!!! D: My lip is poking out :(
Multiply out \[(x-2)^3\] and you will see that the answer is not \[x^3-8\]
In general: \[(a+b)^n \neq a^n+b^n\]
but how would u know it is (x-2)(x^2+2x+4)
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!
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
Graysonunderwoods:
Have you even been beaten by a wet spaghetti noodle by your girlfriend because sh
Ferrari:
I Have Returned to Writing Music (by me) so if you don't know, I used to write songs on here and post them, some of them were lowkey corny though.
kaelynw:
tried a lil smt, the arm is off but i like the other stuff
Countless7Echos:
whaa this looks so silly, nothing is funnier then looking at how I draw my hands
Countless7Echos:
I don't know just no sketch doodle day :p finished a video already so I'm pretty
2 seconds ago
12 Replies
0 Medals
18 minutes ago
34 Replies
2 Medals
5 minutes ago
15 Replies
2 Medals
6 minutes ago
12 Replies
0 Medals
1 day ago
9 Replies
2 Medals