Question

If (x) = 5х – 2 and g(x) = 2х+1, find (f-g)(x).

ОА. 7х- з
ОВ. 7x-1
Ос. 3 – 3х
OD. 3х- з
SUBMIT
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Answer 1

D. 3x - 3

Explanation:

`(f-g)(x)=f(x)-g(x)\\\\f(x)=5x-2,\ g(x)=2x+1\\\\\text{Substitute:}\\\\(f-g)(x)=(5x-2)-(2x+1)\\\\=5x-2-2x-1\qquad\text{combine like terms}\\\\=(5x-2x)+(-2-1)\\\\=3x-3`