Question

x^4-14x^2-32

Answer 1

\[u=x^2\]
\[u^2-14u-32\]

Answer 2

what does this mean??

Answer 3

U is a variable i choose to substitute for x. I wanted it to be a quadratic so i made \[x^4=u^2\]

Answer 4

ok what is the nxt step

Answer 5

solve for U by factoring or quadratic equation.

Answer 6

by factoring

Answer 7

yes it can be done

Answer 8

ok

Answer 9

do you want the factored form?

Answer 10

yes

Answer 11

(u-16)(u+2)

Answer 12

what do you think we would do next?

Answer 13

thats it right just replace u with x

Answer 14

solve for u.
u=16 and -2.
then yes use u =x^2

Answer 15

ok i got it!

Answer 16

don't forget when taking the square root to do positive and negative.