Question

list the intercepts for y=x^4-2x^2-8

Answer 1

y intercept is -8
you need to solve for x to find x intercepts

Answer 2

how is y intercept -8?

Answer 3

you get y intercept when x=0

Answer 4

\[y=x ^{4}-2x ^{2}-8\] list the intercepts

Answer 5

you can factor this
notice
-4*2 = -8
-4 +2 = -2

(x^2 +2)(x^2 -4) = 0
now solve each factor separately
x^2 -4 = 0
x^2 = 4
x = +-(2)

x^2 +2 = 0
x^2 = -2
x = +-sqrt(2)i

Answer 6

plug x=0 into equation:
y = 0 + 0 - 8

Answer 7

oohh i get it.. thanks

Answer 8

yw

Answer 9

if you are happy with the answer plz close the question by clicking on good answer

Answer 10

yes