(n +1n)2 =3\left(n\:+\frac{1}{n}\right)^2\:=3(n+n1)2=3
6x2−54x+30=06x^2-54x+30=06x2−54x+30=0
−9z−1+5z+7-9z-1+5z+7−9z−1+5z+7
−2x2−5x+2-2x^2-5x+2−2x2−5x+2
−6x2−6x−6=0-6x^2-6x-6=0−6x2−6x−6=0
ddy(arc tan(xsen21−xcos2))\frac{d}{dy}\left(arc\:tan\left(\frac{xsen2}{1-xcos2}\right)\right)dyd(arctan(1−xcos2xsen2))
−8x3 x+3\frac{-8x^3}{\:x+3}x+3−8x3
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