y=-x-x²-4x+5
y=-x²-5x+5
xв=-b/2a=5/-2=-2,5
yв=-(-2,5)²-5×(-2-5)+5=11,25
О(-2,5;11,25)
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y=-x-x²-4x+5
y=-x²-5x+5
xв=-b/2a=5/-2=-2,5
yв=-(-2,5)²-5×(-2-5)+5=11,25
О(-2,5;11,25)