Question

a+b+c=
x³+y³+z³=
x²+y²=
give the answer of my question.
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Answer 1

Answer:

0

$x + y + z( {x}^{2} + {y}^{2} + {z}^{2} ) + 3xyz$

${5 }^{2} + {8}^{2} = 25 + 64 = 89$