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> (1)计算:(-1)2+sin230°+(2)0-(12)-1;(2)化简:3x-6x2-4÷x+2x2+4x+4.-数学
(1)计算:(-1)2+sin230°+(2)0-(12)-1;(2)化简:3x-6x2-4÷x+2x2+4x+4.-数学
题目简介
(1)计算:(-1)2+sin230°+(2)0-(12)-1;(2)化简:3x-6x2-4÷x+2x2+4x+4.-数学
题目详情
(1)计算:
(-1
)
2
+si
n
2
30°+(
2
)
0
-(
1
2
)
-1
;
(2)化简:
3x-6
x
2
-4
÷
x+2
x
2
+4x+4
.
题型:解答题
难度:中档
来源:临汾
答案
(1)原式=1+
class="stub"1
4
+1-2=
class="stub"1
4
;
(2)原式=
3(x-2)
(x+2)(x-2)
÷
class="stub"x+2
(x+2)
2
=
class="stub"3
x+2
•(x+2)=3.
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题目简介
(1)计算:(-1)2+sin230°+(2)0-(12)-1;(2)化简:3x-6x2-4÷x+2x2+4x+4.-数学
题目详情
(2)化简:
答案
(2)原式=
=