问题
解答题
若
|
答案
∵
+A x+2
=B x-3
=A(x-3)+B(x+2) (x+2)(x-3)
=Ax-3A+Bx+2B x2-x-6
=(A+B)x+(-3A+2B) x2-x-6
，7x-11 x2-x-6
∴
，A+B=7 -3A+2B=-11
解得：A=5，B=2．
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若
|
∵
+A x+2
=B x-3
=A(x-3)+B(x+2) (x+2)(x-3)
=Ax-3A+Bx+2B x2-x-6
=(A+B)x+(-3A+2B) x2-x-6
，7x-11 x2-x-6
∴
，A+B=7 -3A+2B=-11
解得：A=5，B=2．