Term to be added to $a^{2} - 2 a b$ to make it a perfect square is .

a^{2}

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b^{2}

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2ab

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Solution

The correct option is B $b^{2}$
We know that, $(a - b)^{2} = (a^{2} - 2 a b + b^{2})$ .
So, the term $b^{2}$ is to be added to $(a^{2} - 2 a b)$ in order to make it a perfect square.

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a^{2} + 2 a b

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What term should be added to (a^2 - 2ab) to make it a perfect square?

a^{2} + 2 a b

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