็ฟๅ้ก 2/
P(x)=ax+(b-a)x+(1-2ab)x2+(ab-10)x+2ab ใฎใจใ,
(1) P(x) x-2ใงใใใใใใจใ, a, b ใฎๅคใๆฑใใ.
(2) P(x)ใx+2ใงใใใใใใจใ, a, b ใฎๅคใๆฑใใ.
ฮฑ,
(3) P(x)ใ2-4ใงใใใใใใจใ, a,bใฎๅคใๆฑใ, P (x) ใๅ
ๆฐๅ่งฃใใ.