Quadratic equation : দ্বিঘাত সমীকরণ; বর্গীয় সমীকরণ;
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Appropriate Prepositions
Consist of(গঠিত হওয়া): The committee consists of ten members.
Count for(গণ্য বা বিবেচিত হওয়া): There can be no lasting peace without true democracy in which the people play a part and count for something.
Die from (কোন কিছু জন্য মারা যাওয়া): The poor person died from hunger.
Stare at (চাওয়া বা তাকানো): He stares at me.
Work with (কারো সাথে কাজ করা): They will be working with me on the new project.
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Idioms
Bad book (disfavour-খারাপ নজর —n) The secretary has fallen in the bad book of the manager.
Fight shy (এড়িয়ে চলা): Why do you fight shy of your teacher?
Pack of lies (ডাঁহা মিথ্যা)—He told pack of lies to prove himself innocent.
To the point (সঠিক) - The boy answered the question to the point.
Widow’s mite (দরিদ্রের ক্ষুদ্র দান): A windows mite is no less important than a large contribution of a rich man.