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Surds help

Basically i dont know where to go next with this

the answer is 3 + √ 5 but i don't know how to get there. I dont know have I made an error somewhere.

Help would be much appreciated.


Reply 1
Avatar for B_9710
B_9710
18
Split the fraction up 124+454 \displaystyle \frac{12}{4}+\frac{4\sqrt 5}{4} it may make it easier to see that there is a common factor of 4 on top and bottom of both fractions that cancel.
Reply 2
Avatar for Ayman!
Ayman!
15
Original post by junayd1998
Basically i dont know where to go next with this

the answer is 3 + √ 5 but i don't know how to get there. I dont know have I made an error somewhere.

Help would be much appreciated.




Can you see how this example cleans up?

3y+6x3=3(y+2x)3\displaystyle \frac{3y+6\sqrt{x}}{3} = \frac{3\left ( y+2\sqrt{x} \right )}{3}
(edited 7 years ago)
Reply 3
Avatar for B_9710
B_9710
18
Original post by Ayman!
Can you see how this counterexample cleans up?

3y+6x3=3(y+2x)3\displaystyle \frac{3y+6\sqrt{x}}{3} = \frac{3\left ( y+2\sqrt{x} \right )}{3}


Counterexample?
Reply 4
Avatar for Ayman!
Ayman!
15
Original post by B_9710
Counterexample?


I meant "example". :facepalm:

Thanks for that. :colondollar:

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