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Can someone help? 30 points

Can someone help? 30 points-example-1

1 Answer

9 votes

Answer:

Explanation:

(a). ( f + g )( x )

( x³ -
(1)/(2) x² + x ) + ( x² -
(1)/(4) x - 4 ) =

x³ + ( -
(1)/(2) + 1 ) x² + ( 1 -
(1)/(4) ) x - 4 =

x³ +
(1)/(2) x² +
(3)/(4) x - 4

(b). ( f - g )( x )

( x³ -
(1)/(2) x² + x ) - ( x² -
(1)/(4) x - 4 ) =

x³ -
(1)/(2) x² + x - x² +
(1)/(4) x + 4 =

x³ + ( -
(1)/(2) - 1 ) x² + ( 1 +
(1)/(4) ) x + 4 =

x³ -
(3)/(2) x² +
(5)/(4) x + 4

(c). ( f + g )( 2 )

2³ +
(1)/(2) ( 2 )² +
(3)/(4) ( 2 ) - 4 = 8 + 2 +
(3)/(2) - 4 =
7(1)/(2)

(d). ( f - g )( - 3 )

( - 3 )³ -
(3)/(2) ( - 3 )² +
(5)/(4) ( - 3 ) + 4 = - 27 -
(27)/(2) -
(15)/(4) + 4 = - 23 -
(69)/(4) = -
40(1)/(4)

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