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Pie
3 years ago
10

Find the two square roots of 400

Mathematics
2 answers:
Karo-lina-s [1.5K]3 years ago
6 0

Answer:

20 and -20

20^2 = 400

(-20)^2=400 since two negative is positive

laila [671]3 years ago
4 0
-20 & 20 .. hope this helps a lot ;)
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Could anyone help me with this question? Thank you!
shutvik [7]

Answer:

C

Step-by-step explanation:

We want to simplify the rational expression:

\displaystyle \frac{n^4-11n^2+30}{n^4-7n^2+10}

First, we can factor both the numerator and the denominator. This yields:

\displaystyle =\frac{(n^2-6)(n^2-5)}{(n^2-2)(n^2-5)}

Cancel like terms:

\displaystyle =\frac{(n^2-6)}{(n^2-2)}

However, since we canceled a term from our expression, we must place restrictions in order to stay true to the original expression.

Rational expressions are undefined whenever the denominator equals 0. The denominator is (before canceling):

(n^2-2)(n^2-5)=0

Solve for n. By the zero product property:

n^2-2=0\text{ and } n^2-5=0

Therefore:

n^2=2\text{ and } n^2=5

By taking the square root of both sides (since we are taking an even root, it is required to have plus/minus):

n=\pm\sqrt{2}\text{ and } n=\pm\sqrt5

Therefore, our fully simplified expression is:

\displaystyle \frac{n^2-6}{n^2-2}\, ,n\neq \pm\sqrt5, \pm\sqrt2

Hence, our answer is C!

4 0
3 years ago
Which shows the correct way to use expanded form to multiply 38,070 × 100?
Arada [10]

Answer:

domt know which one but this may help

Step-by-step explanation:

when you take 38707 into consideration the 3 would be 30,000 the 8 would be 8,000 and the 7 would be 70

7 0
3 years ago
Chris uses 324 tiles to cover the top of his computer desk. Of the tiles, 3 are red and the rest are blue. How many tiles are bl
Reptile [31]
This is pretty easy wouldnt it be 321.

324-3=321
6 0
2 years ago
Read 2 more answers
Hi guys what is and can u please do the method 4050 divided by 100
maw [93]

Answer:

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Step-by-step explanation:

what i do is I divided first by 10. because 100 is 10x10.

so 4050 divided by 10 is 405.

405 divided by 10 is 40.5

4 0
3 years ago
Points C, D, and G lie on plane X. Points E and F lie on plane Y.
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Answ

hey 15 hours lateradm ls asdk

Step-by-step explanation:

7 0
2 years ago
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