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Sophie [7]
3 years ago
13

What is the sum of sqrt -2 and sqrt -18

Mathematics
1 answer:
Assoli18 [71]3 years ago
3 0

Answer:

4i sqrt(2)

Step-by-step explanation:

sqrt(-2) + sqrt(-18)

We know sqrt(ab)= sqrt(a) sqrt(b)

sqrt(-1)sqrt(2) + sqrt(9) sqrt(-2)

sqrt(-1)sqrt(2) + sqrt(9) sqrt(2)sqrt(1)

We know the sqrt(-1) is equal to i

i sqrt(2) +3 sqrt(2) i

i sqrt(2) +3i sqrt(2)

4i sqrt(2)

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Elza [17]

Answer:

Standard form: x^3+3x^2-x-3

Leading coefficient: 1

Step-by-step explanation:

3x^2-x-3+x^3=\\x^3+3x^2-x-3

The leading coefficient is 1 because the leading term is x^3.

5 0
2 years ago
Find the quadratic function ..<br><br> 3x2 - y2 = 9<br><br> x2 + 2y2 = 38
ruslelena [56]

Answer:

Step-by-step explanation:

3x2 - y2 = 9.........(1)

x2 + 2y2 = 38......(2)

Let x^2 = a and y^2 = b

:- the two equations becomes

3a - b = 9..........(3)

a + 2b = 38.......(4)

Multiplying (4) by 3

3a + 6b = 114........(5)

Substracting (3) from (5)

3a - 3a + 6b - (-b) = 114 - 9

6b +b = 105

7b = 105

b = 105/7

b = 15

And 3a - b = 9 putting b = 15

3a - 15 = 9

3a = 15+9

3a = 24

a = 24/3

a = 8

And

x^2 = a

x^2 = 8

x = √8

x = √(4×2)

x = 2√2

Also y^2 = b

y^2 = 15

y = √15

6 0
3 years ago
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valkas [14]

Answer:

I would say 42 but some of the image is cut off so I may be wrong:))

Step-by-step explanation:

8 0
2 years ago
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UNO [17]

Answer:

24 in

Step-by-step explanation:

Area of triangle = bh/2

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= 24 in

8 0
3 years ago
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gulaghasi [49]

Its typical because  60 between 100. 8 times 10 seconds equals 80 which is in between so Noah's heart rate is typical.

4 0
3 years ago
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