# If #f(x)=x^2-x#, how do you find #f(2x)#?

All that is required here is to substitute x = 2x into the right side in the same way that is done for a numeric value.

f(2) means substitute x = 2

In the same way:

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To find ( f(2x) ) when ( f(x) = x^2 - x ), substitute ( 2x ) for ( x ) in the expression for ( f(x) ).

So, ( f(2x) = (2x)^2 - (2x) ).

This simplifies to ( f(2x) = 4x^2 - 2x ).

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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