作业帮一些初2因式分解的题计算 3a³b²÷a²+b×(a²b-3ab-5a²b) 化简 1.y(x+y)+(x+y)(x-y)-x²2.2a²-a(a-3)-3[a²-5a(-a-2)3.3(m+1)²-5(m+1)(m-1)+2(m-1)²-2mn4.[(x-y)²+(x+y)(x-y)]÷2x
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/10 08:03:01
![一些初2因式分解的题计算 3a³b²÷a²+b×(a²b-3ab-5a²b) 化简 1.y(x+y)+(x+y)(x-y)-x²2.2a²-a(a-3)-3[a²-5a(-a-2)3.3(m+1)²-5(m+1)(m-1)+2(m-1)²-2mn4.[(x-y)²+(x+y)(x-y)]÷2x](/uploads/image/z/1851455-47-5.jpg?t=%E4%B8%80%E4%BA%9B%E5%88%9D2%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E7%9A%84%E9%A2%98%E8%AE%A1%E7%AE%97+3a%26sup3%3Bb%26sup2%3B%C3%B7a%26sup2%3B%2Bb%C3%97%28a%26sup2%3Bb-3ab-5a%26sup2%3Bb%29+%E5%8C%96%E7%AE%80+1.y%28x%2By%29%2B%28x%2By%29%28x-y%29-x%26sup2%3B2.2a%26sup2%3B-a%28a-3%29-3%5Ba%26sup2%3B-5a%28-a-2%293.3%28m%2B1%29%26sup2%3B-5%28m%2B1%29%28m-1%29%2B2%28m-1%29%26sup2%3B-2mn4.%5B%28x-y%29%26sup2%3B%2B%28x%2By%29%28x-y%29%5D%C3%B72x)
一些初2因式分解的题计算 3a³b²÷a²+b×(a²b-3ab-5a²b) 化简 1.y(x+y)+(x+y)(x-y)-x²2.2a²-a(a-3)-3[a²-5a(-a-2)3.3(m+1)²-5(m+1)(m-1)+2(m-1)²-2mn4.[(x-y)²+(x+y)(x-y)]÷2x
一些初2因式分解的题
计算 3a³b²÷a²+b×(a²b-3ab-5a²b)
化简 1.y(x+y)+(x+y)(x-y)-x²
2.2a²-a(a-3)-3[a²-5a(-a-2)
3.3(m+1)²-5(m+1)(m-1)+2(m-1)²-2mn
4.[(x-y)²+(x+y)(x-y)]÷2x
一些初2因式分解的题计算 3a³b²÷a²+b×(a²b-3ab-5a²b) 化简 1.y(x+y)+(x+y)(x-y)-x²2.2a²-a(a-3)-3[a²-5a(-a-2)3.3(m+1)²-5(m+1)(m-1)+2(m-1)²-2mn4.[(x-y)²+(x+y)(x-y)]÷2x
3a³b²÷a²+b×(a²b-3ab-5a²b)
=3ab²+a²b²-3ab²-5a²b²
=-4a²b²
1,y(x+y)+(x+y)(x-y)-x²
=(y+x-y)(x+y)-x²
=x²+xy-x²
=xy
2,2a²-a(a-3)-3[a²-5a(-a-2)]
=2a²-a²+3a-3a²-15a²-30a
=-17a²-27a
3,3(m+1)²-5(m+1)(m-1)+2(m-1)²-2mn
=-[(m+1)+(m-1)][3(m+1)+2(m-1)]-2mn
=-2m(5m+1)-2mn
=-10m²-2m-2mn
4,[(x-y)²+(x+y)(x-y)]÷2x
=(x-y)[(x-y)+(x+y)]÷2x
=2x(x-y)÷2x
=x-y
计算：-4a²（a的平方）b²（b的平方）
化简：1、xy
2、-17a²-27a²
3、2m+4-2mn
4、x-y
给我分我就告诉你
计算；原式=3b²+ab²-3ab²-5a²b²
=3b²-2ab²-5a²b²
化简；1.原式=xy+y²+x²-y²-x²
=xy
2.内个“[”没有吧，原式=2a²-...
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计算；原式=3b²+ab²-3ab²-5a²b²
=3b²-2ab²-5a²b²
化简；1.原式=xy+y²+x²-y²-x²
=xy
2.内个“[”没有吧，原式=2a²-a²+3a-3a+5a²+10a
=6a²+10a
3.原式=3（m²+2m+1)-5(m²-1)+2(m²-2m+1)-2m
=3m²+6m+3-5m²+5+2m²-4m+2-2m
=10
4.原式=[x²-2xy+y²+x²-y²]÷2x
=[2x²-2xy]÷2x
=x-y
好了，就是这些了，第二题的“[”（中括号）我没加。
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