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Expansion of (x+y)^2

Question 13If...

Question

Question 13
If x + y + z = 0, show that $x^{3} + y^{3} + z^{3} = 3 x y z .$

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Solution

$x + y + z = 0 (x + y + z)^{3} = x^{3} + y^{3} + z^{3} - 3 x y z = 0 \Rightarrow x^{3} + y^{3} + z^{3} = 3 x y z .$

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Q. Question 12
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Expansion of (x+y)^2

Standard VIII Mathematics

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