The expression \( x^{2}-y^{2}-z^{2}+2 y z+x+y-z \) has a factor
(a) \( x-y+z+1 \)
(b) \( -x+y+z ...
The expression \( x^{2}-y^{2}-z^{2}+2 y z+x+y-z \) has a factor
(a) \( x-y+z+1 \)
(b) \( -x+y+z \)
(c) \( x+y-z+1 \)
(d) \( x-y-z+1 \)
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