a)
b)
c)
d)
e)
0,5x²-x=0
x(0,5x-1)=0
x=0 lub x=2
-x²+5x-6=0
a=-1
b=5
c=-6
Δ=b²-4ac
Δ=5²-4·(-1)·(-6)=25-24=1
√Δ=1
x=(1-5)/-2 lub x=(-1-5)/-2
x=2 lub x=3
3x²-x=0
x(3x-1)=0
x=0 lub x=¹/₃
(2x+3)²=0
2x+3=0
x=-1,5
(x+1)²=1
x²+1+2x=1
x²+2x=0
x(x+2)=0
x=0 lub x=-2
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a)
0,5x²-x=0
x(0,5x-1)=0
x=0 lub x=2
b)
-x²+5x-6=0
a=-1
b=5
c=-6
Δ=b²-4ac
Δ=5²-4·(-1)·(-6)=25-24=1
√Δ=1
x=(1-5)/-2 lub x=(-1-5)/-2
x=2 lub x=3
c)
3x²-x=0
x(3x-1)=0
x=0 lub x=¹/₃
d)
(2x+3)²=0
2x+3=0
x=-1,5
e)
(x+1)²=1
x²+1+2x=1
x²+2x=0
x(x+2)=0
x=0 lub x=-2