We treat 1120 as 1100 + 20 and apply the standard two-term addition square identity. Squaring both parts and adding their double product provides the final answer.
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To calculate this square cleanly, we break down 1120 into the addition form 1100 + 20. We apply our regular binomial square identity where a equals 1100 and b equals 20. The square of 1100 is 1210000, and the square of 20 is 400. The middle product term is computed as two multiplied by 1100 multiplied by 20, which equals 44000. Summing these values gives 1254400.
For more NCERT Solutions for Class 9 Maths Ganita Manjari Chapter 4 Exploring Algebraic Identities (2026-27):
https://www.tiwariacademy.com/ncert-solutions/class-9/maths/ganita-manjari-chapter-4/