Решите неполные квадратные уравнения :x²-5x=0 :2)x²-25=0: 3)x²+9=0   ;4)x²+4=0: 5)6x²-24=0   :6)   9x²+9=0  ; 7)8x²+4x=0 ;8)x²-25\49=0; 9)1\3x²+4=0 

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