Question

Someone please help me with this im literally desperate

NO LINKS, FILES, OR PRN PICTURES OR I WILL REPORT

yes someone did post a picture on my previous question but its gone now

Answer 1

x^4 - 3x^2 - 4

x^4 - (4-1)x^2 - 4

x^4 - 4x^2 + x^2 - 4

x^2( x^2 - 4 ) + 1 ( x^2 - 4 )

( x^2 - 4 ) (x^2 + 1 )