Question

if X + Y is equals to 12 and xy is equal to 27 find the value of x cube + y cube​

Answer 1

Answer:

756

Step-by-step explanation:

Given that ,

x+y= 12

xy = 27

Therefore

$x {}^{3} + y {}^{3} =( x + y) {}^{3} - \: 3xy(x + y)$

ie,

$= (12) {}^{3} - 3(27)(12)$

ie,

$= 1728 - 972$

ie,

$= 756$

therefore

$x {}^{3} + y{}^{3} = 756$

Hope this helps u;-)