/2a+1/+4a^2-4ab+b^2=0
/2a+1/+(2a-b)^2=0
/2a+1/=0,(2a-b)^2=0
a=-1/2,b=2a
b=2*(-1/2)=-1
a^2(a-b)-b^2(b-a)
=a^2(a-b)+b^2(a-b)
=(a^2+b^2)(a-b)
=[(-1/2)^2+(-1)^2][-1/2-(-1)]
=(1/4+1)(-1/2+1)
=5/4*1/2
=5/8
/2a+1/+4a^2-4ab+b^2=0
/2a+1/+(2a-b)^2=0
/2a+1/=0,(2a-b)^2=0
a=-1/2,b=2a
b=2*(-1/2)=-1
a^2(a-b)-b^2(b-a)
=a^2(a-b)+b^2(a-b)
=(a^2+b^2)(a-b)
=[(-1/2)^2+(-1)^2][-1/2-(-1)]
=(1/4+1)(-1/2+1)
=5/4*1/2
=5/8