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Completați răspunsul corect: 1) (y-2)² =

2) (2x + 1)² =
3) (z+3)(z-3)=
4) (4x+5)(4x-5) =
5)(√3-√7)² =
6)(3-√2+5)' =
7) 3x 8) (z+8)(-z+8)=