If x

+

y

= 12 and

xy= 27, find the value

of

x

3

1 thought on “If x <br /><br />+ <br /><br />y <br /><br />= 12 and <br /><br />xy= 27, find the value <br /><br />of <br /><br />x<br /><br />3”

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

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