Question

f (x) = (x + 4) (x - 2) , determine the zeros of the function y = f (2x )

Answer 1

\[f(2x)=(2x+4)(2x-1)\]

Answer 2

so zeros are found via
\[2x+4=0\]
\[2x=4\]
\[x=2\]
or
\[2x-1=0\]
\[2x=1\]
\[x=\frac{1}{2}\]

Answer 3

-2 and 1/2