Решите неполные квадратные уравнения: 1) -x-x^2=0
2) -2x^2-4x=0
3) 2y-y^2=4y-5y^2
4) z=7z^2-6z
5) 16-4x^2=0
6) 1-9z^2=0
7) 2x^2-1=0
8) 5=15x^2
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