MartinG621
MartinG621
18-08-2017
Mathematics
contestada
I need help with number 17
Respuesta :
kphung76127
kphung76127
18-08-2017
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.
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