初一因式分解数道1.4m^2-x^2-9-6x2.y^4-4y^3-4y^2-13.a^2+2a+6b-9b^24.m^
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/09/27 21:32:10
初一因式分解数道
1.4m^2-x^2-9-6x
2.y^4-4y^3-4y^2-1
3.a^2+2a+6b-9b^2
4.m^3-nm^2-mn^2+n^3
5.m^2 nx -my -5m^2 -mn^2 x +ny +5n^2
1.4m^2-x^2-9-6x
2.y^4-4y^3-4y^2-1
3.a^2+2a+6b-9b^2
4.m^3-nm^2-mn^2+n^3
5.m^2 nx -my -5m^2 -mn^2 x +ny +5n^2
1.4m^2-x^2-9-6x=(2m)²-(x+3)²=(2m-x-3)(2m+x+3)
2.y^4-4y^3-4y^2-1=y^4-1-4y²(y+1)= (y²+1)(y²-1)-4y²(y+1)=(y²+1)(y-1)(y+1)-4y²(y+1)=【(y²+1)(y-1)-4y²】(y+1)
3.a^2+2a+6b-9b^2=a²-9b²+2a+6b=(a-3b)(a+3b)+2(a+3b)=(a+3b)(a-3b+2)
4.m^3-nm^2-mn^2+n^3=m³+n³-mn(n+m)= (m+n)(m²-mn+n²)-mn(m+n)=(m+n)(m²-mn+n²-mn)=(m+n)(m-n)²
5.m^2 nx -my -5m^2 -mn^2 x +ny +5n^2=m²nx-mn²x-my+ny-5m²+5n²=mnx(m-n)-y(m-n)-5(m+n)(m-n)=(m-n)(mnx-y-5m-5n)
2.y^4-4y^3-4y^2-1=y^4-1-4y²(y+1)= (y²+1)(y²-1)-4y²(y+1)=(y²+1)(y-1)(y+1)-4y²(y+1)=【(y²+1)(y-1)-4y²】(y+1)
3.a^2+2a+6b-9b^2=a²-9b²+2a+6b=(a-3b)(a+3b)+2(a+3b)=(a+3b)(a-3b+2)
4.m^3-nm^2-mn^2+n^3=m³+n³-mn(n+m)= (m+n)(m²-mn+n²)-mn(m+n)=(m+n)(m²-mn+n²-mn)=(m+n)(m-n)²
5.m^2 nx -my -5m^2 -mn^2 x +ny +5n^2=m²nx-mn²x-my+ny-5m²+5n²=mnx(m-n)-y(m-n)-5(m+n)(m-n)=(m-n)(mnx-y-5m-5n)
几道因式分解..4ab(a+b)^2-6a^2b(a+b)(x+y)^2(x-y)+(x+y)(x-y)^22a(a-3
因式分解 (a-b)+x平方(b-a) 4M平方—(m+n)平方 (x-y)平方-2(y-z)+1 -4a平方x平方+8
A={y|y=x2-4x+6,y属于N},B={y|y=-x2-2x+18,y属于N},求A交B.
因式分解 1)9x^4-25y^6 2)4x^2+(x+y)^2+4x(x+y) 3)(a+2b)^2-4ab-13b^
因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)(
求帮忙、因式分解、 6xy^2-9x^2y-y^3= ( a-b)^3(x-y)+(x+y)(a-b)^3= 25(m-
因式分解:(1)(a+b)²+a+b+1/4 (2)6(x-y)²+3(y-x)³
把下列各式因式分解(2m+3n)(2m-n)-4n(2m-n)(x+y)^2(x-y)+(x+y)(y-x)^24a(x
因式分解:16(a-b)平方-25(a+b)平方,x平方-6x+9,(m平方+4m+2)平方-4,(x平方-y平方)+a
因式分解-6a^3+4ab^3-2a^2b,3a^2(x-y)+27(y-x)
分解因式:a^3-a,b^2(x-3)+b^2(3-x),16(m-n)^2-9(m+n)^2,4x^2(x-y)+(y
因式分解:(y^2+3y)^2-(2y+6)^2和4a^2-b^2-4a-2b