Find f(2x) when f(x) = √(5x^2 +3x)

Question

Find f(2x) when f(x) = √(5x^2 +3x)

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Solution

To find f(2x) when f(x) = √(5x^2 +3x), you simply replace every instance of x in the original function with 2x.

So, f(2x) = √(5*(2x)^2 + 3*(2x))

Simplify the equation:

f(2x) = √(5*4x^2 + 6x)

f(2x) = √(20x^2 + 6x)

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