Factorize : x4-y+z4

Matching exercise

    
Match the items on the right to the items on the left.
Step 1
Step 2
Step 3
x4-y+z4=x22-y+z2x22+y+z2
=x-y+zx+y+zx2+y+z2
=x-y-zx+y+zx2+y+z2