问题
解答题
(1)计算:(-2)2-2÷
(2)计算:[(x+3)2+(x+3)(x-3)]÷2x; (3)解分式方程:
|
答案
(1)(-2)2-2÷
+201001 3
=4-6+1
=-1;
(2)[(x+3)2+(x+3)(x-3)]÷2x,
=(x2+6x+9+x2-9)÷2x
=(2x2+6x)÷2x
=x+3;
(3)去分母得:3(x-2)=2(x-1)
化简得:3x-6=2x-2
解得:x=4
经检验,x=4是原方程的解,
∴原方程的解为x=4.