![Class 9 odia grammar Mock Test BSE Odisha (1)](https://examrules.com/wp-content/uploads/2023/06/Class-9-odia-grammar-Mock-Test-BSE-Odisha-1.jpg)
![Class 9 odia grammar Mock Test BSE Odisha (1)](https://examrules.com/wp-content/uploads/2023/06/Class-9-odia-grammar-Mock-Test-BSE-Odisha-1.jpg)
\left( a + b \right)^{2} = a^{2} + b^{2} + 2ab ( T = \frac{1}{f} ) period (in seconds)
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