We substitute a = 3x, b = -2y and c = 4z into the expansion formula. Squaring terms makes them positive, while the cross-products involving the negative y term become negative.
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We substitute a = 3x, b = -2y and c = 4z into the expansion formula. Squaring terms makes them positive, while the cross-products involving the negative y term become negative.
We expand this expression using the three-term standard identity. Here, our terms are 3x, minus 2y and 4z. Squaring these individual parts results in 9x square, 4y square and 16z square. When calculating the paired products, any term multiplied by minus 2y becomes negative, resulting in minus 12xy and minus 16yz. The final product two times 4z times 3x stays positive at 24zx.
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/