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allochka39001 [22]
3 years ago
8

I need whats in the red rectangle

Mathematics
1 answer:
lorasvet [3.4K]3 years ago
3 0

Answer:

9

Step-by-step explanation:

sqrt(5) + sqrt(405)

sqrt(5) + sqrt( 81*5)

sqrt(5) + sqrt(81) sqrt(5)

sqrt(5) +9 sqrt(5)

10 sqrt(5)

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