Question 1205586
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It's just a matter of plugging in what's in the parentheses of f( ) for x.

<i>Suppose f(x)=4x-4.</i>

f(-2)=

You just plug in -2 for x in

f(x)=4x-4.

f(-2)=4(-2)-4 = -8-4 = -12

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<i>f(x)+f(-2)=</i> 

You just plug in (4x-4) for f(x) and (-12) for f(-2)

f(x)+f(-2)= (4x-4)+(-12) = 4x-4-12 = 4x-16

Edwin</pre>