a) y=2x²-x+1
x=-b/(2a)=-(-1)/(2*2)=1/4.
x=1/4.
б) y=-5x²+2x-2
x=-2/(2*(-5))=-2/(-10)=0,2.
x=0,2.
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a) y=2x²-x+1
x=-b/(2a)=-(-1)/(2*2)=1/4.
x=1/4.
б) y=-5x²+2x-2
x=-2/(2*(-5))=-2/(-10)=0,2.
x=0,2.