Find the derivatives

#1) $y=(a^2-5a)^{2010}$

My Answer: $2010(a^2-5a)^{2009}(2a-5)$

#2) $g(x)=cos(PiX^2)$

My Answer: $-2PiX Sin(PiX^2)$

#3) ${z^2-z} / {3z+2}$

My Answer: $(2z-1) - (3z^2-3z) / 3z+2$

2. Originally Posted by Jay23456
Find the derivatives

#1) $y=(a^2-5a)^{2010}$

My Answer: $2010(a^2-5a)^{2009}(2a-5)$

#2) $g(x)=cos(PiX^2)$

My Answer: $-2PiX Sin(PiX^2)$

#3) ${z^2-z} / {3z+2}$

My Answer: $(2z-1) - (3z^2-3z) / 3z+2$
1 and 2 are correct.

3. Is 3 not simplified or or where did i go wrong?

4. $\frac{dy}{dz}\bigg[\frac{z^2-z}{3z+2}\bigg]=\frac{uv'-u'v}{v^2}=\frac{2z-1}{3z+2}-\frac{3(z^2-z)}{(3z+2)^2}$