(x-1)^2+(x-A)(x+2)=2x^2-3x+B
更新1:
to cowboy: 我係要搵個value 唔係你所指個d 可能我講得唔係咁清楚啦 example: Ax^2+Bx^3=6x^2+9x^3 THEN,A=6 B=9 唔好意思,之前打得唔太清楚,誤導左你tim- -''sorry about that!!
更新2:
to tonyleung052: SORRY ABOUT THAT! 你既答案係岩 但係 唔可以代x=-2,when個題目冇提供x=-2 maybe 我比多個example, 2(x+5)+3(x-1)=Ax+B 2x+10+3x-3=Ax+B 5x+7=Ax+B 所以A=5 B=7