Question

∛(8+3√21) + ∛(8-3√21)

solve without calculator

Answer 1

1

Explanation:

I was thinking about it and I prepared my paper and pen and started typing the problem but then I realized this...

8+ and 8-

Then I was like

OK....

Answer 2

Answer: 16

Explanation:

8+3√21 + 8-3√21

= 8 +8 +3√21 -3√21

= 16