Question

y=-2xao quadrado+8x-6

Answer 1

Y=-2x²+8x-6=0 (-1)
Y= 2x²-8x+6=0

a = 2
b = -8
c = 6

Δ = B²-4ac
Δ = -8² - 4·2·6
Δ = 64 - 48
Δ = 16

y = b² +- √Δ ÷ 2a
y = -8 +- √16 ÷ 2·2
y = -8 +- 4 ÷ 4

y' = - 8 - 4 ÷ 4
y' = -16 ÷ 4
y' = - 4

y" = - 8 + 4 ÷ 4
y" = -4 ÷ 4
y" = -1

S={-4 e -1}