Question

たこ焼き( ¨̮ )

想問那個a(x^2…)是怎麼來的？

16. 設多項式f(x)除以x+2餘式為③;除以²+x+3餘式為-3x+2,試求f(x)除以
(x+2)(x²+x+3)的餘式為
f(x) = (x+2)-qx)+3
-x24x-1
= (x+x+3)-2(x) -3x+2
f(-2)=3
f(x) = (x+2)(x3x+3)-3(x) + ((x²+x+3)=3x+2x²-x-3-3x+2
T
a (4-2+3)+8=3
a=-1
=-x=4x-1