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(.)

a f (2) = 10 f (x ) = ax 2 + x + 1 ()

15 ( ) 13 ( ) 7( ) 5 ()

4 4 4 4

f (x ) = 4x 3 + 8x 2 + 6x + 5 ()

4f (1) + 5g(5) g(x) = x 2 − 3x + 1

148 ( ) 147 ( ) 146 ( ) 145 ( )

[AMC10A2002] ( )

(2x + 3)(x − 4) + (2x + 3)(x − 6)

7 () 5( ) 4( ) 7 ()

2

f (x ) = x 3 + 3x 2 + 9x + 3 [AHSME 1965] ( )

(p + q)r g(x) = x 4 + 4x 3 + 6px 2 + 4qx + r

27 ( ) 15 ( ) 12 ( ) −18 ( )

. f (x ) = 3x 3 − 2x 2 − 1 ()

f (x)

x +2 ( ) x2 −1 ( ) x −1 ( ) x +1 ()

f (x ) = x 3 + 2x 2 + ax + b ()

a − b g(x) = x 2 + x + 2

2 ( ) 1 ( ) 0 ( ) −1 ( )

( )81x 4 − 16 = ax2 + b (cx + d)(ex + f ) ()