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Snezhnost [94]
3 years ago
11

Express the prime number 19 as the difference of two squares? 19 =​

Mathematics
2 answers:
Lemur [1.5K]3 years ago
6 0

Step-by-step explanation:

Hey there!

<em>Let's take out the square of 1st ten natural numbers to find out the exact answer.</em>

1² = 1

2² = 4

3² = 9

4² = 16

5² = 25

6² = 36

7² = 49

8² = 64

9² = 81

10² = 100

Now; You can take any of these numbers and subtract from their squares.

<em>So, let's check 6² and 5²</em>

36-25 = 11 which is not equal to 19

<em>Again check for 10²-9²</em>

100 - 81 = 19 (True value)

Therefore, 19 can be expressed as the difference of square of 10 and 9.

<u>Hope</u><u> it</u><u> helps</u><u>!</u>

o-na [289]3 years ago
5 0

Answer:

The two squares are 81 and 100, and their difference is 19

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Answer:

CORRECTED QUESTION:

Two cities have nearly the same​ north-south line of 110 degrees Upper W. The latitude of the first city is 23 degrees Upper N, and the latitude of the second city is 36 degrees N. Approximate the distance between the cities if the average radius of Earth is 6400 km.

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Step-by-step explanation:

Since the two cities both lies on the Northern latitude of the sphere along  the same longitude, we are going to subtract the angles the latitude that each city subtend at the equator.

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