Question

小圓

第12題 我炸開來算還是解不出來

Tell tu-be 440 tiste
(C) =
(D,
- (0 - y + y^(4-5t
- 0x²+ Oxt? ... sa-bt=0
) 12 280 x 85-JT=Rita («-1) (x+2) +6(x+2)(x-3)--(x-1)(x-3)
(A) — 1
(B) 0 oth-S=0
(C) 1
(D) 2 - 0-64
4多項式的除法運算
>
sa-bt3=0 sta 46:12 0
a+26=0 H 2attro 6
-ax++oX+22+bx+x-66-X+4CX-3
= (atb-0x²+(a-bt4cx+(29-66
17-7-12 相等,則a+2b+3c 之值為何? (x+x+1)+b(
xx-)-C(X+3)

Answer 1

😎

上面答案好像錯

Answer 2

我就是我

F(x)=a(x-1)(x+2)+b(x+2)(x-3)-c(x-1)(x-3)
f(x)=7x²-7x-12
已知F(x)=f(x)

F(1)=b*3*-2=-6b
f(1)=7-7-12=-12
-6b=-12
b=2

F(-2)=-c*-3*-5=-15c
f(-2)=28+14-12=30
-15c=30
c=-2

F(3)=a*2*5=10a
f(3)=63-21-12=30
10a=30
a=3

a+2b+3c=3+6-9=0
(B)