1)y`=3x²-4x+1=0
D=16-12=4
x1=(4-2)/6=1/3 U x2=(4+2)/6=1
+ _ +
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1/3 1
min
2)y`=-4+8x-3x²=0
D=64-48=16
x1=(-8-4)/(-6)=2 U x2=(-8+4)/(-6)=2/3
_ + _
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2/3 2
max
3)y`=3x²-7x+2=0
D=49-24=25
x1=(7-5)/6=1/3 U x2=(7+5)/6=2
+ _ +
---------------------------------------------------------
1/3 2
min