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dybincka [34]
3 years ago
14

The function f is defined by f(x) = 2x²-1. Find f (2x).

Mathematics
1 answer:
umka21 [38]3 years ago
5 0

Answer: f(2x)=8x^2-1

Step-by-step explanation:

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(2x) = 2(2x)^2-1\\f(2x) = 2(4)x^2-1\\f(2x) = 8x^2-1\\

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The radius of the circle will be -2. Also, no matter what the sign says, the radius has to always be positive. 
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