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I need help with number 17
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1 vote
I need help with number 17

I need help with number 17-example-1
User Patil Prashanth
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7.3k points

1 Answer

2 votes
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.
User Jeef
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7.7k points
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