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Factor polynomial x1^2+x2^2

An expression to simplify:

The solution

You have entered [src]
  2     2
x1  + x2 
x12+x22x_{1}^{2} + x_{2}^{2}
x1^2 + x2^2
Factorization [src]
(x1 + I*x2)*(x1 - I*x2)
(x1ix2)(x1+ix2)\left(x_{1} - i x_{2}\right) \left(x_{1} + i x_{2}\right)
(x1 + i*x2)*(x1 - i*x2)
Numerical answer [src]
x1^2 + x2^2
x1^2 + x2^2