Question

i need help with math questions

Answer 1

Everybody does :( But whats your question

Answer 2

simplify \[3\sqrt{5}-2\sqrt{7}+\sqrt{45}-\sqrt{28}\] please help?

Answer 3

Is there any answers?

Answer 4

yes sorry.
A. \[2\sqrt{12}\]

B. \[2\sqrt{2}\]

C. \[6\sqrt{5}-4\sqrt{7}\]

D. \[6\sqrt{10}-4\sqrt{14}\]

Answer 5

@iGreen Can you help with this??

Answer 6

Okay, we have to simplify the square root of 45 and the square root of 28. @rikkibracamonte1999

Answer 7

Okay :)

Answer 8

Okay, find the factors of 45 and 28..can you do that?

Answer 9

yes i can

Answer 10

Okay, tell me what you get.

Answer 11

Factors of 45: 1,3,5,9,15 and 45
Factors of 28: 1,2,4,7,14 and 28

Answer 12

Nice work, now which of those are perfect squares?

Answer 13

Do you know what a perfect square is?

Answer 14

no i do not

Answer 15

can you possibly explain it to me?

Answer 16

Okay, perfect squares are numbers that we can get by multiplying two whole numbers together.

81 is a perfect square because the square root of 81 is 9, which is a whole number.

121 is also a perfect square because the square root of 121 is 11, which is also a whole number.

Answer 17

Factors of 45: 1,3,5,9,15 and 45
Factors of 28: 1,2,4,7,14 and 28

So which of those numbers up there are perfect squares?

Answer 18

For 45 i am gonna say 1 and 45
For 28 i am gonna say 2 and 14

Answer 19

No, if you plug them into your calculator to find the square root, you get decimals..so they're incorrect.

Answer 20

sorry :)

Answer 21

i meant :(

Answer 22

math is not my best subject

Answer 23

Okay, 9 and 4 are the perfect squares.

9 because the square root of 9 is 3, and 4 because the square root of 4 is 2.

Answer 24

So we can break up the square root of 45 into:

\(\sf \sqrt{9} \times \sqrt{5}\)

Answer 25

Okay :)

Answer 26

And the square root of 9 is what?

Answer 27

3

Answer 28

Yes, so we have:

\(\sf 3 \times \sqrt{5}\) or \(\sf 3\sqrt{5}\)

Answer 29

We can break up the square root of 28 into:

\(\sf\sqrt{4} \times \sqrt{7}\)

What's the square root of 4?

Answer 30

2

Answer 31

Yes, so we have:

\(\sf 2 \times \sqrt{7}\) or \(\sf 2\sqrt{7}\)

Answer 32

So we have:

\(\sf 3\sqrt{5}-2\sqrt{7}+3\sqrt{5}-2\sqrt{7}\)

Combine the like terms.

\(\sf 3\sqrt 5 + 3 \sqrt 5 =~ \! ?\)

\(\sf -2 \sqrt{7} - 2\sqrt 7\)

Just add 3 + 3 and subtract -2 - 2 and keep the square roots.

Answer 33

so............ its b?

Answer 34

because i did what you said to do

Answer 35

You got it!

\(\sf 3 \sqrt 5 + 3 \sqrt 5 = 6 \sqrt 5\)
\(\sf -2 \sqrt 7 – 2 \sqrt 7 = -4 \sqrt 7\)

So we have:

\(\sf 6 \sqrt 5 – 4 \sqrt 7\)

Answer 36

\(\color{lime}{\underbrace{\overbrace{\Huge\bigstar\star\ast\bigstar\star\ast\bigstar\star\ast\bigstar\star\ast\\\bigstar\star\ast\bigstar\star\ast\bigstar\star\ast\bigstar\star\ast\bigstar\star\ast\bigstar\star\ast\bigstar\star\ast\bigstar\star\ast\bigstar\star\ast\bigstar\star\ast\\\Large{~\succ}\bigstar\boxed{\sf Welcome~to~\color{#3dabea}{Open}\color{#9cc575}{Study}!!!}\bigstar\hspace-5px\prec\\\bigstar\star\ast\bigstar\star\ast\bigstar\star\ast\bigstar\star\ast\bigstar\star\ast\bigstar\star\ast\bigstar\star\ast\bigstar\star\ast\bigstar\star\ast\bigstar\star\ast\\\Huge{\bigstar\star\ast\bigstar\star\ast\bigstar\star\ast\bigstar\star\ast}}}}\) \(\small\sf\color{red}{Made~by~@nobrainiachere,~edited~by~@iGreen}\)

You can give medals by clicking 'Best Response'.

Answer 37

how about this?

Is the simplified form of \[2\sqrt{3}\times2\sqrt{6}\] rational?
A. Yes
B. No

Answer 38

please help @iGreen . Your the best with these types of questions

Answer 39

@texaschic101 @iGreen @bohotness plz help?