We apply the identity by substituting a = 7x and b = 4y. Squaring both individual terms and calculating twice their product gives us the terms 49x square, 56xy, and 16y square.
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CBSE has made the three-language formula compulsory for Classes 9 and 10 from 2026–27 under NEP 2020. However, Hindi has not been made compulsory nationwide. Students must study at least two Indian languages, while schools can choose language combinations.
Chapter 7 “उपायं चिन्तयेत प्राज्ञस्तथापायं च चिन्तयेत” teaches that a wise person always thinks about solutions and possible risks before taking action, promoting planning, logic and decision-making skills.
Chapter 6 “मनःपूतं समाचरेत” teaches that one should act with a pure mind and good intentions. It emphasizes honesty, moral values, discipline and righteous behavior in daily life.
Chapter 5 “एषा सा कृतकबुद्धिः मानवबुद्धः सहकरी” explains intelligence and cooperation. It highlights human wisdom, teamwork and problem-solving skills, showing how intelligent thinking helps in daily life and moral development.