1)5х²-4х=8
5х²-4х-8=0
Д=(-4)²+4*5*(-8)=176
2)
3)15x-x²=0
x(15-x)=0
x=0
15-x=0
x1=0
x2=15
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Answers & Comments
1)5х²-4х=8
5х²-4х-8=0
Д=(-4)²+4*5*(-8)=176
2)
3)15x-x²=0
x(15-x)=0
x=0
15-x=0
x1=0
x2=15