plz help me solvev this!!!no.19
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x+y+z=0,
x+y=-z
(x+y)^3=(-z)^3
x^3+y^3+3×x^2×y+3×x×y^2=-z^3
x+y=-z
(x+y)^3=(-z)^3
x^3+y^3+3×x^2×y+3×x×y^2=-z^3
Arjundas111:
after this?
plz be quick!
x^3+y^3+3x^2y+3XYZ^2=-z^3
x^3+y^3+3XYZ(x+y)=-z^3
plz give me the full answer
next!
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