3 years ago

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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