5х²-х-6=0
D=(-1)-4×5×(-6)=1+121=11²
x1=1-11/10=-1
x2=1+10/10=12/10=6/5=1 целая 1/5
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5х²-х-6=0
D=(-1)-4×5×(-6)=1+121=11²
x1=1-11/10=-1
x2=1+10/10=12/10=6/5=1 целая 1/5