If $f ( x ) = 10 x + 7$ and $g ( x ) = x ^ { 2 } - 7 x$, find $( f - g ) ( x )$.
A) $( f - g ) ( x ) = 10 x ^ { 2 } - 70 x + 7$
B) $( f - g ) ( x ) = 10 x ^ { 3 } - 63 x ^ { 2 } - 49 x$
C) $( f - g ) ( x ) = - x ^ { 2 } + 17 x + 7$
D) $( f - g ) ( x ) = x ^ { 2 } + 3 x + 7$

Question

Quizplus · Accepted Answer

To find $(f - g)(x)$, subtract $g(x)$ from $f(x)$: $f(x) - g(x) = (10x + 7) - (x^2 - 7x) = -x^2 + 17x + 7$.

If f(x)=10x+7f ( x ) = 10 x + 7f(x)=10x+7 And g(x)=x2−7xg ( x ) = x ^ { 2 } - 7 xg(x)=x2−7x

If $f ( x ) = 10 x + 7$ And $g ( x ) = x ^ { 2 } - 7 x$