СРОЧНО!!ДАЮ 50 БАЛОВ
решите уравненияa)2x^2+3x+1=0 б)3y^2+7y-6=0 в)4z^2-11z-3=0 г)3x^2+7x+2=0 е)2z^2+5z+3=0 ж)2z^2+5z+3=0 з)7y^2+9y+2=0 и)6x^2-13x-5=0 .................... а)x^2+5x-6=0 б)x^2+3x+2=0 в)z^2-2z-3=0 г)t^2+t-6=0 д)x^2-4x-21=0 е)x^2+9x+18=0 ж)a^2-7a+6=0 з)b^2-4b-60=0 .................... а)2x^2-3x-5=0 б)y^2-4y-5=0 в)5z^2-2z-3=0 г)-x^2-x+20=0 д)-2x^2+13x-21=0 е)y^2+5y-50=0 ж)x^2-3x-10=0 з)-7x^2+5x+2=0
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