All categories

3 years ago

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)

You might be interested in

In the number 5,678.321 what is the value of the 1? *

Marysya12 [62]

Answer:

a 1 thousandth or 0.001

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

The lateral area of a cone is 400 pi cm squared. The radius is 10 cm. Find the slant height to the nearest tenth.

Ilia_Sergeevich [38]

Answer:

Option A. $40\ cm$

Step-by-step explanation:

we know that

The lateral area of a cone is equal to

$LA=\pi rl$

we have

$LA=400\pi \ cm^{2}$

$r=10\ cm$

substitute and solve for l (slant height)

$400\pi=\pi (10)l$

simplify

$400=(10)l$

$l=400/10=40\ cm$

8 0

3 years ago

Please help me wtih this question

k0ka [10]

Answer:

(-2, 3.5)

Step-by-step explanation:

8 0

4 years ago

A vet's office offers boarding for cats and dogs. boarding a cat cost$20 per night and a dog cost $25 per night if the vet's off

MAVERICK [17]

Answer:

b. x+y=18

20x+25y=400

Step-by-step explanation:

7 0

3 years ago

Difference of Squares gives which complex factors for the expression x2 +3?

Andreas93 [3]

Step-by-step explanation:

Shortest way to solve this question is to find the factors of the given expression.

The given expression is (x² + 13).

Now we have to factorize it.

(x² + 13) = x² + (√13)²

= x² + [-(i)²√(13)²] [Since i = √(-1)]

= x² - (i√13)²

= (x - i√3)(x + i√3) [Since (a² - b²) = (a + b)(a - b)]-by-

5 0

3 years ago