问题
解答题
(1)计算:
(2)化简:(
|
答案
(1)原式=2+1-(
-9
)=3-1=2;4
(2)原式=
•2x2+6x-x2+3x (x-3)(x+3) x2-9 x
=
•x(x+9) x2-9 x2-9 x
=x+9.
(1)计算:
(2)化简:(
|
(1)原式=2+1-(
-9
)=3-1=2;4
(2)原式=
•2x2+6x-x2+3x (x-3)(x+3) x2-9 x
=
•x(x+9) x2-9 x2-9 x
=x+9.