newbie impressions

[Aries]

Solve({x^2+2*x+1>0,x^2-8*x<=0})



Empty set ?????

Solve({logb2(2*x+17)-logb2(x+10)=logb2(-x-4)-3})



Is x=-22 part of the domain ?

Solve({logb2(x+5)=logb4(x+7)



The Prime does not seem to be able to change the base on its own.
Very powerful, without a doubt !
Best,

Aries ;-)