sqrt((13^2-(3^2+4^2))/(2*18))

The answer is 2, but how do you get it?
Thank you

Question

sqrt((13^2-(3^2+4^2))/(2*18))

The answer is 2, but how do you get it?
Thank you

anonymous · Answer

$$\sqrt((13^2-(3^2+4^2))/(2*18))$$

anonymous · Answer

The whole thing is under the radical, correct?  And if so, then 13^2-25 is 144.  Aslo, 18*2=36.  So what is under your radical is $$\sqrt{\frac{ 144 }{ 36 }}=\frac{ 12 }{ 6 }=2$$

aravindg · Answer

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