f ( x ) =  ax^4 + bx^3 + cx^2 + d*x + e
f ´(x ) =  4ax^3 + 3bx^2 + 2cx + d
f ´´(x ) =  12ax^2 + 6bx + 2c
f ( 0 ) = 8
f ´( 0 ) = 0
f ( -2 ) = 3
f ´´ ( -2 ) = 0
f ´( -2 ) = 4
f ( 0 ) = 8  => e =  8
f  ( x ) =  ax^4 + bx^3 + cx^2 + d*x + 8
f ´(x ) =  4ax^3 + 3bx^2 + 2cx + d
f ´´(x ) =  12ax^2 + 6bx + 2c
f ´( 0) =  0 => d = 0
f  ( x ) =  ax^4 + bx^3 + cx^2 + 8
f ´(x ) =  4ax^3 + 3bx^2 + 2cx 
f ´´(x ) =  12ax^2 + 6bx + 2c
f ( -2 ) = 3
f  ( -2 ) =  a(-2)^4 + b(-2)^3 + c(-2)^2 + 8 = 3
f ´( -2 ) = 4
f ´(-2 ) =  4a(-2)^3 + 3b(-2)^2 + 2c(-2) = 4
f ´´ ( -2 ) = 0
f ´´(-2 ) =  12a(-2)^2 + 6b(-2) + 2c = 0
a(-2)^4 + b(-2)^3 + c(-2)^2 + 8 = 3
4a(-2)^3 + 3b(-2)^2 + 2c(-2) = 4
12a(-2)^2 + 6b(-2) + 2c = 0
3 Gleichungen mit 3 Unbekannten.
f ( x ) = 0,0625·x^4 - 1,5·x^2 + 8