分解因式16(2m n)-8n(2m n) n
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(x+2y)"-x"-2xy=(x+2y)"-x"-2xy-y"+y"=(x+2y)"-(x+y)"+y"=(x+2y-x-y)(x+2y+x+y)+y"=y(2x+3y)+y"=y(2x+3y+y)
原式=abm²+abn²+a²mn+b²mn=(abm²+a²mn)+(abn²+b²mn)=am(bm+an)+bn(
m(m+n)²-4mn²=m[(m+n)²-4n²]=m[(m+n)+2n][(m+n)-2n]=m(m+3n)(m-n)
m+m^2-mn^2+2m^2n=m(1+m+2mn-n^2)
原式=m²+5mn-3mn-15n²=m(m+5n)-3n(m+5n)=(m+5n)(m-3n)再问:还有道题。分解因式(a-b)的平方-(a-b)-2,要详细过程再答:令x=a-
原式=4m^2+8mn-4n^2-4n^2+3n^2=(2m+2n)^2-n^2=(2m+2n+n)(2m+2n-n)=(2m+3n)(2m+n)
=2m^2n+4m^2-12mn-3mn^2+9n^2=(4m^2-12mn+9n^2)+mn(2m-3n)=(2m-3n)(2m+3n+mn)
m-n-mn+1,=(m-mn)+(1-n),=m(1-n)+(1-n),=(m+1)(1-n).
2㎡—mn+2m+n—n²=2m²-(n-2)m+n(1-n)=(2m+n)(m+(1-n))=(2m+n)(m-n+1)此题如仍有疑问,欢迎追问!再问:2步到3步再详细一点再答:
2m^2n^2-2n^2+(mn-1)(m-1)^2=2n^2(m^2-1)+(mn-1)(m-1)^2=2n^2(m-1)(m+1)+(mn-1)(m-1)^2=(m-1)[2n^2(m+1)+(m
1:2m²n-3mn²=mn(2m-3n)……………………(√)2:-2a²-4a=-2(a+2)…………………………(×) -2a²-4a=-2a(a+2)
m^2n-2mn^2+mn=mn(m-2n+1)
mn+m^2n^2+m^2n+mn^2=m^2n(n+1)+mn(n+1)=mn(n+1)(m+1)或:mn+m^2n^2+m^2n+mn^2=mn(mn+m+n+1)=mn(n+1)(m+1)
x^2-4mx+8mn-4n^2=(x-2m)^2-4(m-n)^2=(x-2n)(x-4m+2n)
-4m^2n^3+12m^3n^2-2mn=2mn(6m²n-2mn²-1)不明白,可以追问如有帮助,记得采纳如追加其它问题,采纳本题后点击想我求助,谢谢祝学习进步!
m²+2n-mn-2m=m(m-n)-(2m-2n)=m(m-n)-2(m-n)(m-n)(m-2)
原式=6a(m-n)²+8(m-n)³=2(m-n)²[3a+4(m-n)]=2(m-n)²(3a+4m-4n)再问:6m(m-n)²-8(n-m)&
-m²+4mn-4n²=-(m²-4mn+4n²)=-(m-2n)²
紫凌圣樱:2x²-4x=2x(x-2)8m²n+2mn=2mn(4m+1)a²x²y-axy²=axy(ax-y)-2x²-12xy&sup
m²+4mn+4n²=(m+2n)²