Question

Pleaseee help??
Using numerical values, prove the identity.
x^3+y^3=(x+y)(x^2-xy+y^2)

Answer 1

assign x and y numbers and evaluate

Answer 2

How do I do that?

Answer 3

x=2, y=5
etc/

Answer 4

What are the numbers? Do i pick them myself?

Answer 5

I'm pretty sure you get to make them up

Answer 6

Ok
hold on.

Answer 7

(2)^3+(3)^3=((2)+(3))((2)^2-(2)(3)+(3)^2)

Answer 8

x=2 and y=3

Answer 9

x^3+y^3=(x+y)(x^2-xy+y^2)
x=2//y=3
\[\large (2)^3+(3)^3=(2+3)((2)^2-(2)(3)+(3)^2)\]
evaluate the left side now

Answer 10

16+81

Answer 11

@bibby you there?

Answer 12

420

Answer 13

choochin atm

Answer 14

I really need help though :(

Answer 15

yeah let me see

Answer 16

(x+y)(x^2-xy+y^2)
(5)(4-6+9)=(5)(7)=35

Answer 17

whoops

Answer 18

Lol i did the left side which was 16+81

Answer 19

yeah, it doesn't seem to match up. I'll try it with 2 different numbers because wolfram agrees it's true

Answer 20

ok

Answer 21

I mean there is two sides to the problem, so dont you need a letter to bring it over?

Answer 22

x^3+y^3=(x+y)(x^2-xy+y^2)
x=3, y=4
3^3+4^3=27+64=91

(3+4)(3^2-(3*4)+4^2)
7(9-12+16)=7*13=91

Answer 23

Soooooo, is that the answer?

Answer 24

there is no answer. you have to pick out any 2 numbers and prove that both sides evaluate to the same number as I just did

Answer 25

ohhhhhhhhhhhhhhhhhhh!!!!!!

Answer 26

Can i ask you an other question pkease??

Answer 27

I'm married, sorry

Answer 28

oh golly. I mean like math haha

Answer 29

rofl I know, post another question and tag me in it. Or post it here, I'm not a cop.

the general etiquette is one question per post but i don't care about medals

Answer 30

Ohhhh sowwy!

Answer 31

y sowwy
just ask yo question

Answer 32

create a polynomial of degree 3 or higher that has three or more terms. @bibby

Answer 33

first learn me miss professor lalalala0726
what is the degree of a polynomial

Answer 34

i have no clue:( and reallyneed to get this done in like 10 minutes.. I promise ill learn!

Answer 35

timed test?

Answer 36

whatever, the degree of a polynomial is the largest exponent. so x^4 + x^3 is of degree 4

Answer 37

so write one out degree 3 or greater with 3 terms or more

Answer 38

Ohhhhok soooo, can i do
x^3+x^5?

Answer 39

that works. in general we sort downwards so x^5 would cum first
then there's the fact that it has to be 3 terms or more and that's 2

Answer 40

ok, sooo can i do x^5+x^2?

Answer 41

that's still 2 terms

Answer 42

then instead of 2 can i do 3?

Answer 43

@bibby

Answer 44

you kinda have to do 3 or more, add a term

Answer 45

ok so x^5+x^4

Answer 46

that's still 2 terms

Answer 47

x^5+x^4+x^3

Answer 48

nice

Answer 49

correct*