Plantear vs. sacar
In Spanish, plantear and sacar are two verbs that can be translated as to raise or to bring up in the context of mentioning something for discussion. However, they aren't completely interchangeable and each has its unique usage context.
Plantear
B1Plantear generally means to propose or suggest a question, problem, or issue that needs to be considered or solved.
Vamos a plantear un nuevo enfoque para el proyecto.
(We are going to propose a new approach for the project.)
El profesor planteó un problema difícil en la clase.
(The teacher raised a difficult problem in the class.)
Es importante plantear estas cuestiones para lograr una solución.
(It's important to bring up these issues in order to find a solution.)
Sacar
A2Sacar is more commonly used to mean to take out, to remove, or to extract. However, in the context of raising topics, sacar can be used. It has a connotation of bringing up a topic unexpectedly or changing the subject in a conversation.
No creí que sacaras ese tema en la reunión.
(I didn't think you would bring up that topic during the meeting.)
Siempre saca el mismo asunto en cada conversación.
(He always brings up the same subject in every conversation.)
Ella sacó el problema de la falta de comunicación en la empresa.
(She brought up the issue of lack of communication within the company.)
Summary
Plantear and sacar both can mean to raise or to bring up, but their usage is different. While plantear is more about proposing or suggesting questions, problems, or issues for consideration, sacar conveys the action of bringing up topics unexpectedly or changing the subject.