Question

this stuff is so hard!

Answer 1

Can I ask you, do you want to try and learn the material or just get an answer?

Answer 2

you can't see it ?

Answer 3

both!

Answer 4

OK, so if r=1 + 2Sqrt[2], then you want to compute r^2. So use the "FOIL" technique to mulitply

(1 + 2Sqrt[2]) * (1 + 2Sqrt[2])

Answer 5

just an answer right now because they only give me an hour i only have 7 mintues now!

Answer 6

Well if you just want an answer then go to wolfram alpha and type in this:
(1 + 2Sqrt[2])^2

Answer 7

It's a lot faster and easier than talking to people here.

Answer 8

okay thank you! :-)

Answer 9

was i right on the other question i asked?

Answer 10

I don't think so, no, but you can type that one into wolfram alpha too

Answer 11

how would i type that ?

Answer 12

(1/2) * (base) * (height), but use the real values for base and height

Answer 13

square roots are "Sqrt[number]"

Answer 14

yeah when i typed it , it didn't give me an answer? just 50%?

-_-

Answer 15

what did you type?

Answer 16

(1/2) * (√(90) * (10+√3)

Answer 17

You left off a ) at the end

Answer 18

what about this one