题目内容
计算题
1.![]()
2.![]()
3.12ab2(abc)4÷(-3a2b3c)÷[2(abc)3]
4.(a+b-c)(a-b+c)
1.原式=
=![]()
2.原式=
=
=-![]()
3.原式=12a5b6c4÷(-3a2b3c)÷[2a3b3c3]
=(-4a3b3c3)÷(2a3b3c3)
=-2
4.原式=[a+(b-c)][a-(b-c)]
=a2-(b-c)2
=a2-(b2-2bc+c2)
=a2-b2-c2+2bc
解析:略
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题目内容
计算题
1.![]()
2.![]()
3.12ab2(abc)4÷(-3a2b3c)÷[2(abc)3]
4.(a+b-c)(a-b+c)
1.原式=
=![]()
2.原式=
=
=-![]()
3.原式=12a5b6c4÷(-3a2b3c)÷[2a3b3c3]
=(-4a3b3c3)÷(2a3b3c3)
=-2
4.原式=[a+(b-c)][a-(b-c)]
=a2-(b-c)2
=a2-(b2-2bc+c2)
=a2-b2-c2+2bc
解析:略