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Katyanochek1 [597]
3 years ago
13

Calculate the total surface area of the triangular pyramid.

Mathematics
1 answer:
AleksandrR [38]3 years ago
3 0

Answer:

45

Step-by-step explanation:

15+10= 25 + 20 = 45

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With some simple rearrangement, we can rewrite the numerator as

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Then factorizing the difference of squares, x^2-1=(x-1)(x+1), we end up with

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