Question

x^4 - 33x^2 - 108 = 0

Answer 1

let
\[u=x^2\]

Answer 2

\[u^2-33u-108=0\]

Answer 3

-108=-36*3

-36+3=-33

\[u^2+3u-36u+108\]

Answer 4

\[u^2+3u-36u-108\]*

Answer 5

\[u(u+3)-36(u+3)\]

Answer 6

can you finish this?

Answer 7

yes i got it sorry i forgot to close it.