八年级因式分解题做出来加十分(要过程)x²(a-1)+y²(1-a)-x³+x²-1/4x(m²+n²)²-4m²n²(a+3b)-(3a+b)²x^4-2x²y²+y^4x²(a-2)+4y²(2-a)(5m²+
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八年级因式分解题做出来加十分(要过程)x²(a-1)+y²(1-a)-x³+x²-1/4x(m²+n²)²-4m²n²(a+3b)-(3a+b)²x^4-2x²y²+y^4x²(a-2)+4y²(2-a)(5m²+
八年级因式分解题
做出来加十分(要过程)
x²(a-1)+y²(1-a)
-x³+x²-1/4x
(m²+n²)²-4m²n²
(a+3b)-(3a+b)²
x^4-2x²y²+y^4
x²(a-2)+4y²(2-a)
(5m²+3n²)²-(3m²+5n²)²
3a²-1/3b²
希望大家帮一下,谢谢啦!
第四道题写错了(a+3b)²-(3a+b)²
帮下忙哈,谢谢大家
八年级因式分解题做出来加十分(要过程)x²(a-1)+y²(1-a)-x³+x²-1/4x(m²+n²)²-4m²n²(a+3b)-(3a+b)²x^4-2x²y²+y^4x²(a-2)+4y²(2-a)(5m²+
x²(a-1)+y²(1-a)=x²(a-1)-y²(a-1)=(x²-y²)(1-a)=(x+y)(x-y)(1-a)
-x³+x²-1/4x=x(-x²+x-1/4)=-1/4(4x²-4x+1)=-1/4(2x-1)^2
(m²+n²)²-4m²n²=m^4+n^4+2m²n²-4m²n²=m^4+n^4-2m²n²=(m²-n²)²=[(m+n)(m-n)]²
(a+3b)²-(3a+b)²=a^2+9b^2+6ab-9a^2-b^2-6ab=8b^2-8a^2=8(b-a)(b+a)
x^4-2x²y²+y^4=(x^2-y^2)^2=[(x+y)(x-y)]^2
x²(a-2)+4y²(2-a)=x²(a-2)-4y²(a-2)=(x²-4y²)(a-2)=(x+2y)(x-2y)(a-2)
(5m²+3n²)²-(3m²+5n²)²=25m^4+9n^4+30m^2n^2-9m^4-25n^4-30m^2n^2=16m^4-16n^4=16(m^2+n^2)(m^2-n^2)=16(m^2+n^2)(m+n)(m-n)
3a²-1/3b²=1/3(9a^2-b^2)=1/3(3a+b)(3a-b)