6 / (3 + √5) = (18 - 6√5) / 4 my question is that can u subtract 6 from 18..why or why not?
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Originally Posted by Power 6 / (3 + √5) = (18 - 6√5) / 4 my question is that can u subtract 6 from 18..why or why not? $\displaystyle \frac{6}{3+\sqrt{5}}=\frac{18-6\sqrt{5}}{4}$ Multiplying both sides gets you $\displaystyle \frac{24}{3+\sqrt{5}}=18-6\sqrt{5}$ now if you are asking from here can you subtract the asnwer is no because the two numbers do not have a common denominator
Originally Posted by Power 6 / (3 + √5) = (18 - 6√5) / 4 my question is that can u subtract 6 from 18..why or why not? No. This is kind of how I saw it... the radical is like a variable... and the 18 and 6 are not like terms.. ...just a thought... But I know you cant
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