Question

If x+y=12 and xy=27, what is x^3+y^3?

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Answer 1

Answer:

9+3=12

9×3=27

l don't know another answer

Answer 2

Answer: 756

Step-by-step explanation: x+y=12, x=12-y

xy=27,x=27/y

x=27/y=12-y

27/y=12-y

12y - y^2= 27

y^2-12y+27=0

y^2-3y-9y+27=0

y(y-3)-9(y-3)=0

(y-9)(y-3)=0

y=9 or y=3

when y=9

x=12-y

x=3

when y =3

x=12-3

x=9

x^3+y^3

9^3+3^3=756