Question

y=x^3+2x^2-4x-8 list the intercepts

Answer 1

you know the y-intercept right?

Answer 2

ummm nope.. im guesin -8??

Answer 3

yes

Answer 4

yeahhhhhhhh but the for the make y=o

Answer 5

(-2, 0)(2, 0)

Answer 6

okay so i got my y intercept. how do i find my x intercept?

Answer 7

Solve for x, like I did above.

Answer 8

one factor is x+2

Answer 9

oh my g this confusing!!!!

Answer 10

use factor by grouping, it works out nicely
(x^3 +2x^2) + (-4x-8) =0
x^2(x+2) -4(x+2) =0
(x+2)(x^2-4) = 0

x+2 = 0
x = -2

x^2 -4 = 0
x^2 = 4
x = +-2

Answer 11

my points are (2,0), (-2,0) and (0,-8)?

Answer 12

correct

Answer 13

thank you