При каких значениях параметра а уравнение lg ((x^2)+3x+a)=lg ((x+1)^2) не имеет корней?

 

Пожалуйста, с очень подробным решением.

this is the largest member of the dog family. it is now found mainly in forests. they cooperate when they hunt , and this allows them to kill animls several times their own size . they share their food , wolves have a strict order - junior wolves have to wait for larger , older animals.