Can someone help? 30 points

Step-by-step 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 - = -

at least two

step-by-step explanation: