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18-10-2021
Mathematics

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Fill in the number that completes the square. x² + 4x + ___

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VirαtKσhli VirαtKσhli

18-10-2021

Given :-

x² + 4x + __

To find :-

The value of blank .

Solution :-

We can use the identity ,

(a+b)² = a² + b² + 2ab .

Given ,

x² + 4x + __
x² + 2*2*x + __

Add 2²

x² + 2.2.x + 2²
( x + 2)²

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