Answer:
5
Explanation:
(2x – 4)² – 5 = 31
Adding 5 to both sides gives
(2x – 4)² – 5+5 = 31+5
(2x – 4)² = 36
(2x – 4) = √36
2x-4 = 6
Adding 4 to both sides gives
2x-4+4=6+4
2x= 10
Divide through by 2
2x/2 = 10/2
X= 5.
