Mathematics, 13.10.2020 02:01 JAlvelo

Simplify each radical And show your work √72
√20
√42
2√12
3√75
-2√18

Answers: 2

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Answers

Answer from: andile64

[See Below]

Step-by-step explanation:

$\boxed{Hey~There!}$

__________________________________________________________

$\boxed{Simplify~each~radical:}$

1.) $\sqrt{72}$ :

Factor

into its prime factors :

72 = 23 * 32

To simplify a square root, we extract factors which are squares, factors that are raised to an even exponent. Factors which will be extracted are:

36 = 22 * 32

Factors which will remain inside the root are:

2 = 2

To complete the simplification we take the square root of the factors which are to be extracted. We do this by dividing their exponents by

6 = 2 * 3

$\boxed{The~answer~is: 6\sqrt{2}}$

2.) $\sqrt{20}$ :

Factor

into its prime factors :

20 = 22 * 5

To simplify a square root, we extract factors which are squares, factors that are raised to an even exponent. Factors which will be extracted are:

4 = 22

Factors which will remain inside the root are:

5 = 5

To complete the simplification we take the square root of the factors which are to be extracted. We do this by dividing their exponents by

2 = 2

$\boxed{The~answer~is: 2\sqrt{5}}$

3.) $\sqrt{42}$ :

Factor

into its prime factors :

42 = 2 * 3 * 7

To simplify a square root, we extract factors which are squares, factors that are raised to an even exponent. In our case however, all the factors are only raised to the first power and this means that the square root can not be simplified .

$\boxed{The~answer~is: \sqrt{42} }$

4.) $2\sqrt{12}$ :

Factor

into its prime factors :

12 = 22 * 3

To simplify a square root, we extract factors which are squares, factors that are raised to an even exponent. Factors which will be extracted are:

4 = 22

Factors which will remain inside the root are:

3 = 3

To complete the simplification we take the square root of the factors which are to be extracted. We do this by dividing their exponents by

2 = 2

$\boxed{The~answer~is: 4\sqrt{3} }$

5.) $3\sqrt{75}$ :

Factor

into its prime factors :

75 = 3 * 52

To simplify a square root, we extract factors which are squares, factors that are raised to an even exponent. Factors which will be extracted are:

25 = 52

Factors which will remain inside the root are:

3 = 3

To complete the simplification we take the square root of the factors which are to be extracted. We do this by dividing their exponents by

5 = 5

$\boxed{The~answer~is: 15\sqrt{3}}$

6.) $-2\sqrt{18}$ :

Factor

into its prime factors :

18 = 2 * 32

To simplify a square root, we extract factors which are squares, factors that are raised to an even exponent. Factors which will be extracted are:

9 = 32

Factors which will remain inside the root are:

2 = 2

To complete the simplification we take the square root of the factors which are to be extracted. We do this by dividing their exponents by

3 = 3

$\boxed{The~answer~is: 3\sqrt{5}~or~-6\sqrt{2}}$

__________________________________________________________

$Hope~this~helps~Mate~\\-Your~Friendly~Answerer,~Shane$ ^-^

Answer from: Quest

Hey there, 128 *(2/3) = 85.3

85.3-64 = 21.3

so laura has already added 85.3 grams of chocolate powder and she has gone over the amount specified in the recipe by 21.3 grams

hope i ! have a great day!

Answer from: Quest

The answer is y=-

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