Question

If x

+

y

= 12 and

xy= 27, find the value

of

x

3

+

y

3

. ​

Answer 1

Step-by-step explanation:

x+y=12

xy=27

find:-x³+y³

x³+y³=(x+y) (x²+y²-xy)

x³+y³=(12)((x+y) ²-2xy-xy)

x³+y³=12((12)²-3xy)

x³+y³=12(144-3(27))

x³+y³=12(144-81)

x³+y³=12(63)

x³+y³=756

HOPE IT HELPS YOU