3. Write two linear functions, fx) and g(x). For example, f(x) = 3x - 7 and g(x) = -2x+ 5. Then see whether f(x) - (-9(x)) is equivalent to f(x)+ g(x). Hint:
To find -g(x), just change the signs of all the terms in g(x). Discuss whether
you think your results would apply to every function.