Ответ:
х²-4х-5=0
D=4²-4х(-5)×1=16+20= 36=6
х1=(4+6)/2=5
х2=(4-6)/2=-1
ответ:5;-1.
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Ответ:
х²-4х-5=0
D=4²-4х(-5)×1=16+20= 36=6
х1=(4+6)/2=5
х2=(4-6)/2=-1
ответ:5;-1.