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QUESTION
Q
If x + y + z = 0, then what is the value of
Solution
x + y + z = 0
Therefore,
x + y = −z
y + z = −x
z + x = −y
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Solution
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Keynote
If, a + b + c = 0
Then,
a3 + b3 + c3 = 3abc
SUBSTITUTION METHOD:
Given, x + y + z = 0
Select any value of (x, y, z) which satisfy the equation.
(2, −1, −1), (−2, 1, 1), (−1, 0, 1), (0, 0, 0) are some...
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