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> 计算:(1)3-8+214-(-1)2-|-12|+(3-2)0;(2)(2x-3y)2-(2x+3y)(-3y+2x);(3)因式分x3-6x2+9x.-数学
计算:(1)3-8+214-(-1)2-|-12|+(3-2)0;(2)(2x-3y)2-(2x+3y)(-3y+2x);(3)因式分x3-6x2+9x.-数学
题目简介
计算:(1)3-8+214-(-1)2-|-12|+(3-2)0;(2)(2x-3y)2-(2x+3y)(-3y+2x);(3)因式分x3-6x2+9x.-数学
题目详情
计算:
(1)
3
-8
+
2
1
4
-
(-1)
2
-|-
1
2
|+(
3
-2
)
0
;
(2)(2x-3y)
2
-(2x+3y)(-3y+2x);
(3)因式分x
3
-6x
2
+9x.
题型:解答题
难度:中档
来源:不详
答案
(1)原式=-2+
class="stub"3
2
-1-
class="stub"1
2
+1=-1;
(2)原式=4x2-12xy+9y2-(4x2-9y2),
=18y2-12xy;
(3)原式=x(x2-6x+9)=x(x-3)2.
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题目简介
计算:(1)3-8+214-(-1)2-|-12|+(3-2)0;(2)(2x-3y)2-(2x+3y)(-3y+2x);(3)因式分x3-6x2+9x.-数学
题目详情
(1)
(2)(2x-3y)2-(2x+3y)(-3y+2x);
(3)因式分x3-6x2+9x.
答案
(2)原式=4x2-12xy+9y2-(4x2-9y2),
=18y2-12xy;
(3)原式=x(x2-6x+9)=x(x-3)2.