15x^2+2x-1=0
D=2^2-4*(-1)*15
D=4+60
D=64
x1=0,2
x2=-1/3
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D=4+4*15*1=64
x1=-2+8/15*2=0,2
х2=-2-8/30=-1/3
Ответ:0,2 и -1/3.
15x^2+2x-1=0
D=2^2-4*(-1)*15
D=4+60
D=64
x1=0,2
x2=-1/3