помогите пожалуйста,решите уравнение
а)0,01х^2+0,09=0,06х
б)1/4у^2-у=-1
в)9/16z^2-1/2z+1/9=0
г)(х-3)^2+2(х-3)(х+1)+(х+1)^2=0
заранее огромное спасибо;)
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