Question

Prove: \(\dfrac{(x+y)^2}{4}(x-y) =\dfrac{x^3-y^3}{3}\)
Please, help

Answer 1

here is my proof
put \(x=1,y=0\) get \[\frac{1}{4}=\frac{1}{3}\]

Answer 2

That means it is not true, right?

Answer 3

not true in that case for sure

Answer 4

Ok, thank you

Answer 5

yw