Example: If f(x)=10-2x and g(x)=6x-5, then (f+g)(x) = ? x+ ?
(You don’t have to answer this specific question; just a general answer is fine !!)
In: 1
Simply put, you put the first one + the second one. Same for substraction.
(f+g)(x) is equal to f(x) + g(x}
With your example, it would then become:
(-2x+10) + (6x-5)
Parentheses are useless here, so by dropping them, you end with 4x+5.
Subtraction is exactly the same as an addition by a negative value, so, the operation is the same, but you swap the signs of one of them.
(-2x+10) + (-6x+5)
Again, parentheses are useless so by dropping them, you end with -8x+15.
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