Question

find x^3 + y^3 if x+y =10 and xy = 21​

Answer 1

Step-by-step explanation:

x³+y³=(x+y)³-3xy(x+y)

x³+y³=1000-3(21)(10)

x³+y³=1000-630

x³+y³=370

Answer 2

Answer:

hey mate there's your answer

given x+y=10 and xy=21

we know that,

(x+y)^3=x^3+y^3+3xy(x+y)

put those values in above equation.

(10)^3=x^3+y^3+3(21)(10)

1000 =x^3+y^3+630

x^3+y^3=1000-630

x^3+y^3=370

hope it helps you .............

thank you!!!