Question

what is the equation for when you have x^3-y^3

Answer 1

differnce of cubes: (a-b)(a^2+ab+b^2)

Answer 2

in your case a=x and b=y

Answer 3

are the two addition symbols supposed to be addition or is there one that should be a minus or what

Answer 4

ya

Answer 5

no, two addition symbols

Answer 6

let me give you the equation... its 4x^3-32^3

Answer 7

so it would be\[(4x-32y)(16x^2+128xy+1024y)?

Answer 8

y being squared

Answer 9

okay, here we can factor out a 4 which makes this: 4(x^3-8^3), then we simply apply the difference of square to the inside of the parenthese, where a=x and b=2. This results in: 4(x-2)(x^2+2x+4)

Answer 10

where does the two come from... sorry im tired and my brain doesnt work that well when im tired

Answer 11

oh wait it it 4x^3-32 or 4x^3-32^3

Answer 12

the second one

Answer 13

but theres a y in between the 32and^3 see i messed it up

Answer 14

come on man

Answer 15

okay so, then its 4x^3-32y^3

Answer 16

okay, so we factor out a 4 and get: 4(x^3-8y^3). Now the inside is a difference of cubes. With a=x and b=2y. Now why is b=2y, where (2y)^3=8y^3. Now can you plug that into (a-b)(a^2+ab+b^2)

Answer 17

thanks