precalculus

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Given f(x) and g(x) below, find:
(a) f + g (b) f – g (c)f*g(d)f/g
Please show all of your work.
f(x) = 5x^2-5
g(x) = x – 7

  • precalculus -

    What's the problem? Just substitute for f and g:

    (c) f*g = (5x^2-5)(x-7) = 5(x-1)^2(x-7) = x^3 - 9x^2 + 15x - 7

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