Question

14) Determine o vértice das seguintes funções:
a) Y=-x² + 2x-1 b) Y=x²-4x
C)Y=x²-4​

Answer 1

a) -b/2a = -2/-2 = 1

y = 1² +2 -1

y = 2

V(1,2)

b) -b/2a = 4/2 = 2

y = 2² -4.2

y = 4 -8

y = -4

V(2,-4)

c) 0/2 = 0

y = 0-4

y = -4

V(0,-4)