Answer:
Explanation:
(a). ( f + g )( x )
( x³ -
x² + x ) + ( x² -
x - 4 ) =
x³ + ( -
+ 1 ) x² + ( 1 -
) x - 4 =
x³ +
x² +
x - 4
(b). ( f - g )( x )
( x³ -
x² + x ) - ( x² -
x - 4 ) =
x³ -
x² + x - x² +
x + 4 =
x³ + ( -
- 1 ) x² + ( 1 +
) x + 4 =
x³ -
x² +
x + 4
(c). ( f + g )( 2 )
2³ +
( 2 )² +
( 2 ) - 4 = 8 + 2 +
- 4 =
(d). ( f - g )( - 3 )
( - 3 )³ -
( - 3 )² +
( - 3 ) + 4 = - 27 -
-
+ 4 = - 23 -
= -