function

[clever nest]

vertex (-1,-1) equation f(x)=ax2+bx+c so a+b+c?

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[clever nest]

v(-1-1) P(0,-3)
-3=a(0-1)²-1
a=-3

y=-3(x+1)²-1 (equation of a parabola with a definite vertex)

-3(x2+2x+1)-1

-3x²-6x-3-1

-3x²-6x-4

a+b+c
-3+-6+-4=-13

but I couldn't find such an option

what is wrong here

[clever nest]

+close