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 (nobody)...and 386 guests Last 5 registered Oplandisks nothingstar N_loop yipe foxtrotromeo Browse members... |
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Members 8025Messages 2613462 Today 5 Topics 127501 |
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rationalise the denominator of 4 _______ 1 - √3 I got -2√5-(3/2)√7-3 but apparantly its (1/2)(6+√35+2√7+3√5) wtf? |
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the answer is either 1, 0 or 42 |
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I believe it works like: 4 (1 + √3) ____________ 1 - √3 (1 + √3) (multiply the entire fraction by the denominator's conjugate) which becomes: 4 (1 + √3) _________ 1 - 3 ( so -2) (denominator now rationalized) then you can simplify it to - 2(1 + √3) _________ or -2 - 2√3 1 |
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wooohh ive entered into the we soo cool geek fwead !! YEAHH maths !! let me grab my pens and papers. lets all get really great !! |
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the demonimator is irrational you cant rationalise it |
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oh bugger, i posted the wrong question, but what you've done is right i think : ) well i got the same anyway. what i meant to post was √5 + 2 ______ √7 - 3 which gives me -2√5-(3/2)√7-3 but i cannot see how this is wrong |
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xltronic latex plugin coming in v2 |
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haha ok that makes a lot more sense given your first answer (√5 + 2) (√7 + 3) ______ (√7 - 3) (√7 + 3) (remember to multiply both parts of the fraction by the conjugate.) (√5 + 2) (√7 + 3) = √35 + 3√5 + 2√7 + 6 ______ (√7 - 3) (√7 + 3) = 7 - 9 = -2 so the answer should be: √35 +3√5+2√7+6 _______________ -2 (this cannot be reduced further using integers) written another way: -(1/2)(6+√35+2√7+3√5) |
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You have done horrid mistakes. |
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nice one, i see it now. thanks! |
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np |
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It's a solid test for your brains. |
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Here you have something to ponder. 1-1=2-2 1(1-1)=2(1-1) 1=2 |
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IT'S A SOLID TEST FOR YOUR BRAINS. |
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nice, nice |
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so the "=" lies to us. |
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Guybrush is erroneous. TRY AGAIN, CAPTAIN. |
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i am happy for you to tell me where |
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You're not doing anything right. DO MATH, DON'T DO WRONG. |
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MATHEMATICS IS ABOUT THINKING, NOT CALCULATING. |
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God is a mathematician. |
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divide by zero? since when is that ok? |
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that's a black post innit |
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It took a Swede from flumskolan to figure this out. |
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wat |
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swedish buttsex |
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there are four types of people in this world , those that can count well , those that are great at counting and those that can not. anyone fancy going on a mountain hike ? |
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Did you notice that the dog catches the bal with its ear? Brilliant. |
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yes acid droplet creature. |
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although i beleive guybrush to be a "he" or maybe she brushed at the thought ? but guys brush is an expert and can hold it in his ear for many months. guybrush rules. |
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you do pretty weird stuff with your ears too. |
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yep forever now it seems, as my metamorphosis function is not able due to avetariee function disable.: you have lovely molecule ears. : P |
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