Question

if x+y=10and xy=21,find the value of x³+y³​

Answer 1

Answer:

10x²+10y²-210

Step-by-step explanation:

x³+y³

using identities,

a³+b³=(a+b)(a²-ab+b²)

(x+y)(x²-xy+y²)

(10)(x²+y²-(21))

10x²+10y²-210

Answer 2

Answer:

hey ..ur ans is 10x^2+10y^2-210