I need help on radicals. I have a problem that looks kind of like this:
x = radical(-4) * radical(-3)
I don't really know what to do in this situation. Can someone here give me some advice?
Quote from: 11clock on May 17, 2011, 02:19:19 PM
I need help on radicals. I have a problem that looks kind of like this:
x = radical(-4) * radical(-3)
I don't really know what to do in this situation. Can someone here give me some advice?
Imaginary numbers eh?..I kinda remember this..I believe this problem is done like so (I'll do it step by step so you hopefully understand what I am doing)
x=√(-4) * √(-3)...since √(-1)=i and √(4)=2, we get √(-4) equaling 2i....
x=2i*√(-3)...again since √(-1)=i, we replace √(-3) with i√(3)...
x=2i*i√(3)...we multiply 2i and i to get 2i^2...
x=2i^2√(3)....and i^2=-1 so...
x=2(-1)*√(3)
x=-2√(3) which is the final answer.
Ah, I get it now. Thanks!
I'm going to put this out there also.
Link (http://www.wolframalpha.com/input/?i=x+%3D+radical%28-4%29+*+radical%28-3%29)
Best calculator ever!
Quote from: 11clock on May 17, 2011, 03:17:58 PM
Ah, I get it now. Thanks!
Sort of out of the question but you've taken algebra 1 then geometry so your in algebra 2 now?
Quote from: Forum on May 17, 2011, 09:42:24 PM
Quote from: 11clock on May 17, 2011, 03:17:58 PM
Ah, I get it now. Thanks!
Sort of out of the question but you've taken algebra 1 then geometry so your in algebra 2 now?
The title of this topic answers your question.
And this reminds me how much I hate algebra.... It hurts my brain :<
Quote from: 11clock on May 18, 2011, 05:56:51 PM
Quote from: Forum on May 17, 2011, 09:42:24 PM
Quote from: 11clock on May 17, 2011, 03:17:58 PM
Ah, I get it now. Thanks!
Sort of out of the question but you've taken algebra 1 then geometry so your in algebra 2 now?
The title of this topic answers your question.
No it doesn't some people skip a course but i get it.