Question

найдите координаты вершины параболы: y=-3x^2-6x+2 ; y=-x^2+x-1 ; y=5x^2-10x+4

Answer 1

y=-3x^2-6x+2

x0=-b/2a=-(-6)/2*(-3)=-6/6=-1

y0=-3(-1)^2-6(-1)+2=-3+6+2=5

 

y=-x^2+x-1

x0=-b/2a=-1/2*(-1)=1/2

y0=-(1/2)^2+1/2-1=-0.25+0.5-1=-0.75

 

y=5x^2-10x+4

x0=-b/2a=-(-10)/2*5=10/10=1

y0=5-10+4=-5+4=-1

 

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