Question

If x

+

y

= 12 and

xy= 27, find the value

of x
³+ y³.

. ​

Answer 1

Answer:

756

FORMULA=

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

Step-by-step explanation:

therefore SUBSTITUTING THE VALUES WE GET AS

${x}^{3} + {y}^{3} \\ = {12}^{3} - 3(27)(12) \\ = 1728 - (81 \times 12) \\ = 1728 - 972 \\ = 756$