Question

a) y=x²-5x-24
b) y=2x²-x+2
c) f(x)=x²-6x+9
d) f(x)=x²-9

Answer 1

Vamos lá:

a) y = x² - 5x - 24

x1 = -3, x2 = 8

b) y = 2x² - x + 2

delta negativo

c) f(x) = x²- 6x + 9

x = 3

d) f(x) = x² - 9

x1 = -3, x2 = 3