谁有学宛新报初一上学期第13期的B卷的全部答案,谁囿啊,急用,大哥们

7彩波板糖2022-10-04 11:39:541条回答

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唯舞独尊1 共回答了22个问题 | 采纳率77.3%: 当a-b=2时,求(a-b)(a+b)(a-b)+ab(b-a)
将a-b=2换成a=2+b代入(a-b)(a+b)(a-b)+ab(b-a),
再把a-b=2换成b=a-2代入(a-b)(a+b)(a-b)+ab(b-a),
两式相等,加上已知条件a=2+b
就成了二元二次方程组
算出a等于多少,b等于多少,代入就可以求结果了.!; 1年前

学宛新报 2010-2011学年人教课标版七年级第四十四期七年级下车期末复习题《1》 apqueen1年前2: RACY2121 共回答了14个问题 | 采纳率92.9%

建议以后还是把题目发上来,否则像你现在这样提问是不可能得到解答的.

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英语《学宛新报》35期答案答 九霄环佩鸣1年前1: 敖夜共回答了18个问题 | 采纳率94.4%

I'm wangNan,a student of No.1 Middle School. I have a gooa friend,Jim.He' an USA girl.We are both in Class Two,Grade Eight.She is 15 years old,one year older than me. We both study hard.I'm good at physices,but she's good at math.We often help each other with lessons.Both of us like helping others. We both like sports very much.Jim enjoy playing basketball.but Ilike palying soccer. She likes green but Ilike red. Tough we are different in my ways,we are good friends

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