Question

find the value of x³+y³-12xy+65if x+y=4

Answer 1

we know

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

here given x+y=4

(4)^3=x^3+y^3-3xy(4)+65

64=x^3+y^3-12xy(4)+65

hey here value of x y is not given something is wrong about it

Answer 2

Answer: I got 3(43-8xy)