问题
解答题
计算:(1)
(2)
|
答案
(1)
+a b+1
-2a b+1
=3a 1+b
=0;a+2a-3a b+1
(2)
•x2+1 x-3
=x2-9 x3+x
×x2+1 x-3
=(x-3)(x+3) x(x2+1)
.x+3 x
故答案为0、
.x+3 x
计算:(1)
(2)
|
(1)
+a b+1
-2a b+1
=3a 1+b
=0;a+2a-3a b+1
(2)
•x2+1 x-3
=x2-9 x3+x
×x2+1 x-3
=(x-3)(x+3) x(x2+1)
.x+3 x
故答案为0、
.x+3 x