If f (x) = 25-x2 and g (x) = x+5, what is (fg) (x) ? Write your answer in simplest form. When f (x) = 25-x2 and g (x) = x+5, (fg) (x) =

Question

Mathematics

Ahmed Mueller

16 September, 09:33

If f (x) = 25-x2 and g (x) = x+5, what is (fg) (x) ? Write your answer in simplest form. When f (x) = 25-x2 and g (x) = x+5, (fg) (x) =

+5

Answers (1)

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Russell Love · Answer 1

(fg) (x) means to multiply the functions f (x) * g (x).

(25 - x^2) (x + 5)

25 * x = 25x

25 * 5 = 125

- x^2 * x = - x^3

- x^2 * 5 = - 5x^2

Putting it all back together:

- x^3 - 5x^2 + 25x + 125