去括号:1.n-3(4-2m)2.-1/2(x+y)+1/4(p+q)合并同类项:1.3(-ab+2a)-(3a-b)2.xy-3x^3-(-2xy-x^2)+(-2x^2-3)-(-5+xy)3.7(a-b-c)-5(a+b-c)+3(a-b-c)+(a+b-c)小明在计算A-(ab+2bc-4ac)时,由于马虎,将“A-”写成了“A+”,得到的结
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![去括号:1.n-3(4-2m)2.-1/2(x+y)+1/4(p+q)合并同类项:1.3(-ab+2a)-(3a-b)2.xy-3x^3-(-2xy-x^2)+(-2x^2-3)-(-5+xy)3.7(a-b-c)-5(a+b-c)+3(a-b-c)+(a+b-c)小明在计算A-(ab+2bc-4ac)时,由于马虎,将“A-”写成了“A+”,得到的结](/uploads/image/z/5174946-18-6.jpg?t=%E5%8E%BB%E6%8B%AC%E5%8F%B7%EF%BC%9A1.n-3%284-2m%292.-1%2F2%EF%BC%88x%2By%EF%BC%89%2B1%2F4%28p%2Bq%29%E5%90%88%E5%B9%B6%E5%90%8C%E7%B1%BB%E9%A1%B9%EF%BC%9A1.3%EF%BC%88-ab%2B2a%29-%283a-b%292.xy-3x%5E3-%28-2xy-x%5E2%29%2B%28-2x%5E2-3%29-%28-5%2Bxy%293.7%28a-b-c%29-5%28a%2Bb-c%29%2B3%28a-b-c%29%2B%28a%2Bb-c%29%E5%B0%8F%E6%98%8E%E5%9C%A8%E8%AE%A1%E7%AE%97A-%EF%BC%88ab%2B2bc-4ac%EF%BC%89%E6%97%B6%2C%E7%94%B1%E4%BA%8E%E9%A9%AC%E8%99%8E%2C%E5%B0%86%E2%80%9CA-%E2%80%9D%E5%86%99%E6%88%90%E4%BA%86%E2%80%9CA%2B%E2%80%9D%2C%E5%BE%97%E5%88%B0%E7%9A%84%E7%BB%93)
去括号:1.n-3(4-2m)2.-1/2(x+y)+1/4(p+q)合并同类项:1.3(-ab+2a)-(3a-b)2.xy-3x^3-(-2xy-x^2)+(-2x^2-3)-(-5+xy)3.7(a-b-c)-5(a+b-c)+3(a-b-c)+(a+b-c)小明在计算A-(ab+2bc-4ac)时,由于马虎,将“A-”写成了“A+”,得到的结
去括号:
1.n-3(4-2m)
2.-1/2(x+y)+1/4(p+q)
合并同类项:
1.3(-ab+2a)-(3a-b)
2.xy-3x^3-(-2xy-x^2)+(-2x^2-3)-(-5+xy)
3.7(a-b-c)-5(a+b-c)+3(a-b-c)+(a+b-c)
小明在计算A-(ab+2bc-4ac)时,由于马虎,将“A-”写成了“A+”,得到的结果是3ab-2bc+5bc.试问正确的结果是多少?
最后是3ab+2ac+5bc
去括号:1.n-3(4-2m)2.-1/2(x+y)+1/4(p+q)合并同类项:1.3(-ab+2a)-(3a-b)2.xy-3x^3-(-2xy-x^2)+(-2x^2-3)-(-5+xy)3.7(a-b-c)-5(a+b-c)+3(a-b-c)+(a+b-c)小明在计算A-(ab+2bc-4ac)时,由于马虎,将“A-”写成了“A+”,得到的结
1 n-12+6m
2 -1/2x-1/2y+1/4p+1/4q
合并同类项
1 3a+b-3ab
2
3 6a-14b-6c
ab-bc+8ac
1. n-3(4-2m)=n-12+6m
2. -1/2(x+y)+1/4(p+q)=-1/2x-1/2y+1/4p+1/4q
3.
1.(4n-12)-(2n+6)
1. n+6m-12
2. -0.5x-0.5y+0.25p+0.25q
1.-3ab-a+b
2.-3x^3-x^2-2xy+2
3. 6a-14b-6c
正确的结果是-ab-10bc+13ac (你打错了最后一项应该是ac)
1. n+6m-12
2. -0.5x-0.5y+0.25p+0.25q
1.-3ab-a+b
2.-3x^3-x^2-2xy+2
3. 6a-14b-6c
1.n-12+6m
2.-1/2x+1/2y
1.-3ab+6a-3a+b
2.xy-3x^3+2xy+x^2-2x^2-3+5-xy
3.7a-7b-7c-5a-5b+5c+3a-3b-3c+a+b-c
以上自己合并,我没时间了。88