Question

HELP!

Answer 1

@denonakavro

Answer 2

How far did you get ?

Answer 3

I'm confused.. I just need help with starting it, I believe its A^2 + B^2 = C^2..

Answer 4

3^2+3^2 = c^2
9+9 = 18
c= sqrt 18

Answer 5

ok, and the A and B stand for the sides

Answer 6

Ok.

Answer 7

replace the A and the B with the numbers they gave you

Answer 8

3 and 3

Answer 9

yes, and "put them into the equation"

Answer 10

SO thats 3^2 + 3^2 = C^2?

Answer 11

Then we can simplify sqrt 18
sqrt18 = sqrt(2x3x3) = 3(sqrt2)

Answer 12

yes, now do 3*3

Answer 13

9

Answer 14

that means 3^2 = 3*3 is 9
replace the 3^2 with 9
and add them

Answer 15

18.

Answer 16

so what does your equation look like now ?

Answer 17

3^2+3^2 = c^2
9+9 = 18

Answer 18

Lol I did not even give him an answer and I get warned thanks a lot

Answer 19

almost.
the left side is 18, the right side is c^2
try again

Answer 20

So C is 18 right?

Answer 21

no. notice you do this:
3^2 + 3^2 = c^2
you replace 3^2 with 9 (because you know 3^2 is the same as 9)
9+9= c^2

then you add 9+9 to get 18
replace 9+9 with 18 to get
18= c^2

that says c^2 is 18 (which is different from c=18)

Answer 22

Ok.

Answer 23

do you know how to get just c ?

Answer 24

No..

Answer 25

I thought C was the answer..

Answer 26

you have to learn that square root of c^2 is c
if you have
c^2 = 18
you "take the square root" of both sides

that means write a square root around each side
can you do that ?

Answer 27

No. o.o

Answer 28

write sqrt next to each side

Answer 29

Ok. So write that against C^2 = 18

Answer 30

yes, on both sides

Answer 31

Sqrt C^2= 18 Sqrt

Answer 32

yes. If you use the equation editor you would write it this way
\[ \sqrt{c^2}= \sqrt{18} \]
now simplify the left side. remember the square root "undoes" the square

Answer 33

although I would write the right side as sqrt 18
which is a way to say \[ \sqrt{18} \]

Answer 34

you should get
c= sqrt 18
or
\[ c= \sqrt{18} \]

Answer 35

Oh. Thanks.

Answer 36

Do you have to simplify sqrt of 18?

Answer 37

do you know how to write 18 as numbers multiplied together ?

Answer 38

Yes.

Answer 39

what do you get ?

Answer 40

2x3x3

Answer 41

yes
so for part B you start with
\[ c= \sqrt{2\cdot 3 \cdot 3}\]

if you have a *pair* of numbers inside a square root, you can take them out
what is left inside the square root if you take out a pair of the same number ?

Answer 42

2?

Answer 43

yes. the 2 stays inside the square root.
if you take out a pair , 3*3 in this case, you put only *one of them* out in front of the square root

Answer 44

so 3 sqrt 2?

Answer 45

yes, but you should type out the whole line:
c= 3 sqrt 2

that is the answer for part B

Answer 46

Ok, can you put everything we worked over because I want to write it down for notes. Equation wise.

Answer 47

You will have to read over the posts up above

Answer 48

for part C, you should use a calculator (though some people memorize the sqrt 2)

Answer 49

Ok.