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balandron [24]
3 years ago
15

7.

Mathematics
2 answers:
o-na [289]3 years ago
6 0

Answer:

answer...

Step-by-step explanation:

here is u answer

IRINA_888 [86]3 years ago
4 0

Answer:

-  \frac{1}{2}  {n}^{2}  + 18 = 0 \\ -  \frac{1}{2} {n}^{2}  =  - 18 \\  {n}^{2}  =  - 18 \times  - 2 \\  {n}^{2}  = 36 \\ n =   +  - \sqrt{36}  \\ n =  +  - 6

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