October 2018 2 34 Report

Oblicz wyróżnik trójmianu kwadratowego:

a) y=-2x²+5x+7 Δ=b^2-4ac=5²-4*(-2)*7.........

b) y=2x²+3x+2

c)y=-2x²+3x-1

d) y=4x²-12x+9

e) y= -½x²+6x-3

Oblicz współrzędne wierzchołka paraboli:

a) y=x²-2x+5

Δ=

xw=

yw=

b) y=x²+6x+3

Δ=

xw=

yw=

c) y= -x²+x-1

Δ=

xw=

yw=

d) y=2x²+6x-1


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