I need help with number 17

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asked Jan 1, 2018 140k views

1 Answer

Jeef · Answer 1 · 2018-01-05T07:58:44+0000

To find f(x)-g(x), find (3x-21)-(3x+21)

(3x-21)-(3x+21)

Flip the signs in the second binomial
(3x-21)-3x-21

Combine like terms
3x-3x-21-21
-21-21
-42

The final answer is -42. X is irrelevant because whatever you plug in will always equal -42.

I need help with number 17

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