Answer:
w = 4√2
Step-by-step explanation:
2w^2 - 64 = 0
=> 2w^2 = 64
=> w^2 = 32
=> w = √ 32
=> w = √ [(2 x 2) x (2 x 2) x 2]
=> w = 2 x 2 x √ 2
=> w = 4√2
