Question

find the value 45² using the column method​

Answer 1

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Find the value 45² using the column method

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Column 1 = 40² —a²

Column 2 = 2×40×5 —2ab

Column 3 = 5² —b²

Sum of All the columns is your answer !

This is Done using the identity of (a+b)²

Ans :—

1600+400+25=2025

Hope it Helps