Question

Determine o valor de y: )USANDO OS SEGUINTES VALORES) - função de 2°grau
A) Y=X^2+3.X-2 (-1,-2,-3/1,2,3)
B) Y=X^2-4 (1,2,3,-1,-2,-3)
C) 2X^2-8x+2 (1,2,3,-1,-2,-3)

Answer 1

A) Y=X^2+3.X-2 (-1,-2,-3/1,2,3)

Y= (-1)^2+3.(-1)-2
Y=1 -3 -2
Y= -4

Y= (-2)^2+3.(-2)-2
Y= 4 -6 -2
Y= -4

Y= (-3)^2+3.(-3)-2
Y=9 -9 -2
Y= -2


Y=1^2+3.(1)-2)
Y= 1 +3 -2
Y= -2

Y=2^2+3.(2)-2
Y= 4 +6 -2
Y= 8

Y=3^2+3.(3)-2
Y= 9 +9 -2
Y= 16

B) Y=X^2-4 (1,2,3,-1,-2,-3)
Y=1^2-4
Y=-3

Y=2^2-4
Y= 0

Y=3^2-4
Y= 5

Y=(-1)^2-4
Y= -3

Y=(-2)^2-4
Y=0

Y=(-3)^2-4
Y= 5


C) Y=2X^2-8x+2 (1,2,3,-1,-2,-3)

Y= 2(1)^2-8(1)+2
Y=-4

Y=2(2)^2-8(2)+2
Y= -6

Y=2(3)^2-8(3)+2
Y= -12

Y=2(-1)^2-8(-1)+2
Y= 12

Y=2(-2)^2-8(-2)+2
Y= 26

Y=2(-3)^2-8(-3)+2
Y= 44