Quoting Post Archived Topic: It will not be bumped to the top of the forum. Topic Multiplying Radicals Membername   Not a member? Sign Up Free (takes 20 seconds) Password   Forgotten your password? Post Font: Verdana Arial Black Georgia Comic Sans Impact   Size: Tiny Normal Big Huge   Color: Default Dark Red Red Orange Brown Green Olive Cyan Blue Dark Blue Indigo Black [ Check Spelling ] [ Post Preview ] [ LiveTags ] Quote: from [m]Dylan6405[/m] at 9:51 pm on Dec. 7, 2008[quote]Its 1 AM FUCK MATH[/quote] FAQ Keyword Search: Post Options Favorites Manager Notify me of new replies to this topic by email Notify me of new replies to this topic by private message Original Post KRNsoccerplayer24 Posted at 9:49 pm on Dec. 7, 2008 I got a problem that is squareroot -81 multiplied by squareroot -25 i dun get how to do it...i thought the answer would be 45

Replies JudeLaurence Posted at 10:05 pm on Dec. 7, 2008 i is the sqrt(-1), so i^2 = -1. KRNsoccerplayer24 Posted at 10:02 pm on Dec. 7, 2008 Quote: from DarkLink224 at 9:55 pm on Dec. 7, 2008 sqrt(-81) = 9i sqrt(-25) = 5i 9i * 5i = 45i^2 = -45 would it be 45i^2 KRNsoccerplayer24 Posted at 10:00 pm on Dec. 7, 2008 Quote: from The Wolfhound at 9:53 pm on Dec. 7, 2008 College? You're kidding me, right? You're doing THIS in college? This is going to be easier than I thought... Im in really low math thats why..not so great at it. JudeLaurence Posted at 9:55 pm on Dec. 7, 2008 sqrt(-81) = 9i sqrt(-25) = 5i 9i * 5i = 45i^2 = -45 The Wolfhound Posted at 9:53 pm on Dec. 7, 2008 College? You're kidding me, right? You're doing THIS in college? This is going to be easier than I thought... noraa Posted at 9:53 pm on Dec. 7, 2008 Quote: from The Wolfhound at 9:52 pm on Dec. 7, 2008 That would be   sqrt (-81) * sqrt (-25) = sqrt (81*25) = 9*5 = 25 Clear? No, because sqrt of a negative is an imaginary! hubbabubba52 Posted at 9:53 pm on Dec. 7, 2008 25..its like the easiset problem ever.. Thanantos Posted at 9:53 pm on Dec. 7, 2008 well i suck at math it came to me when i did it and i forgot it so sorry KRNsoccerplayer24 Posted at 9:52 pm on Dec. 7, 2008 Quote: from dylan6405 at 9:51 pm on Dec. 7, 2008 Its 1 AM FUCK MATH I got exams dude...college...its hard...i need to study... The Wolfhound Posted at 9:52 pm on Dec. 7, 2008 That would be sqrt (-81) * sqrt (-25) = sqrt (81*25) = 9*5 = 25 Clear? Dylan6405 Posted at 9:51 pm on Dec. 7, 2008 Its 1 AM FUCK MATH noraa Posted at 9:51 pm on Dec. 7, 2008 There's no such thing as the square root of a negative number, it's an imaginary number. So you get i*i which would be i squared. bstodge Posted at 9:51 pm on Dec. 7, 2008 81x25=2025 square root of 2025=??? ???=answer All 13 previous replies displayed.