Factorisation
a² + b²+ c²+ 2ab + 2bc + 2ca
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a² + b²+ c²+ 2ab + 2bc + 2ca
=a² + b²+ c²+ 2(ab + bc + ca)
=( a + b + c)²
Answered by
1
Answer:
(a+b+c)^2 ist the answer
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