If ω≠1 is a cube root of unity, show that 1-ω+ω26+1+ω-ω26=128

Matching exercise

    
Match the items on the right to the items on the left.
Step 1
Step 2
Step 3
Step 4
Step 5
step 1.PNG
step 2.PNG
step 3.PNG
step 4.PNG
step 5.PNG