Question

∛20+14√2 + ∛20-14√2 =

Answer 1

∛20 + 14√2 + ∛20 - 14√2
=2∛20

Here,  14√2 and  - 14√2 get cancelled.

Answer 2

given,
 ∛20+ 14√2 +∛20-14√2
by re-arranging values,
∛20+∛20+14√2-14√2
= 2(∛20)
=2∛20
therefore,∛20+ 14√2 +∛20-14√2 = 2∛20