Question

a) y = x² + 3
b) y=-x2 + 6x
c) y = x² + 2x - 3
d) y = x2 - 4x - 5
e) y = -x² + 4x - 4​

Answer 1

Resposta:

a)y=x²+3

0=x²+3

b)y=-x²+6x

0=-x.2+6

x=0

c)y=x²+2x-3

y+?=x²+2x+?-3

y+?=x²+2x+1-3

y+1=x²+2x+1-3

y+1=(x+1)²-3

y=(x+1)²-3-1

y=(x+1)²-4

d)y=x2-4x-5

0=x.2-4x-5

x=-5/2

x=-2 1/2 ,x-2,5