GrammarObject: The receiver of an action is called object. Affected person, place or thing of a sentence is called object. Ex: they are painting the room. He will invite us tonight. Object divided in two parts First: direct object. Second: indirect object. 1-    Direct object is an object which receives the action first and it is usually a thing. 2-    Indirect object is an object which receives the action second and it  is usually a person.  (s+v+d.ob+P+in.ob) Ex: they bought a car for Ali. She made a cake for her children. I teach English you. Ex: they bought Ali a car. (s + v+ in.ob+ d.ob) She made her children a cake. Note: it has more used. Complement Complement is a part of a sentence that completes the meaning of a sentence. Complement can be a noun a pronoun an adjective an adverb and a prepositional phrase that completes the meaning of a sentence. Note: preposition + noun. Ex: Ali is a teacher. He runs fast. This book is mine. She is at home. She looks beautiful. e.o .p Extension of predicate Predicate: Main verb if a sentence is called predicate. Without subject the meaning patt of a sentence is called predicate. Ex: Ali bought a car. E. O.P: whatever comes after the main verb without object/complement is called  E.O .P E.O .P gives us additional information. E.O.P divided in two parts Time Expression. Place expression Ex: Ali bout a car yesterday Ali bought a car in Kabul What does USA stand for. Tense Tense is tak

خاصیت اول: هر گاه در اطراف یک معادله الجبری عین عدد یا عین مقدار جمع و یا تفریق نمائیم در مساوات یا معادله کدام تغیر وارد نمی شود. مثلاً: اگر  باشد و خواسته باشیم یک عدد مانند  و یا  را در اطراف آن علاوه نمائیم در معادله کدام تغیر رو نما نمی شود. زیرا:                                   مثال عددی:                                                                                                                                                                            &