Question

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

Answer 1

by hit and trial method

let x=1

x+y=12

1+y=12

y=12 -1

y= 11 no this is not correct as there muliplication is not 27

now let x= 2

x+y= 12

2+y=12

y=12-2

10

no

now let x=3

3+ y=12

y=12 - 3

9 yes as 3*9=27

now there cubes

x=3

y=9

x=(3)^3=29

y=(9)^3=729