f(x)=5x+2, find f(2)

f(x)=4^2-x, find f(-1)

f(x)=2, find f(-2)

f(2) = 5*2+2 = 12

f(-1)= 4^2 - (-1) = 16+1 = 17

f(-2) = 2 (function is a constant for all x)

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