Respuesta :

YousefPlayz

Answer:

1

Step-by-step 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....

Eduard22sly

Answer: 16

Step-by-step explanation:

8+3√21 + 8-3√21

= 8 +8 +3√21 -3√21

= 16

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