请高手帮我算分解因式!!!
①3m(x-y)(a-b+c)+6n(y-x)(b-a-c)②(a+x)^n+1(b+x)^n-1-(a+x)^n(b+x)^n...
① 3m(x-y)(a-b+c)+6n(y-x)(b-a-c)
② (a+x)^n+1 (b+x)^n-1 - (a+x)^n (b+x)^n 展开
② (a+x)^n+1 (b+x)^n-1 - (a+x)^n (b+x)^n 展开
1个回答
展开全部
① 3m(x-y)(a-b+c)+6n(y-x)(b-a-c)
= 3m(x-y)(a-b+c)+6n(x-y)(a-b+c)
=(x-y)(a-b+c)(3m+6n)
=3(x-y)(a-b+c)(m+2n)
② (a+x)^n+1 (b+x)^n-1 - (a+x)^n (b+x)^n
=(a+x)^n(b+x)^n-1*(a+x) -(a+x)^n(b+x)^n-1*(b+x)
=(a+x)^n(b+x)^n-1*[(a+x)-(b+x)]
=(a+x)^n(b+x)^n-1*(a-b)
不懂还可问,满意请及时采纳!o(∩_∩)o
= 3m(x-y)(a-b+c)+6n(x-y)(a-b+c)
=(x-y)(a-b+c)(3m+6n)
=3(x-y)(a-b+c)(m+2n)
② (a+x)^n+1 (b+x)^n-1 - (a+x)^n (b+x)^n
=(a+x)^n(b+x)^n-1*(a+x) -(a+x)^n(b+x)^n-1*(b+x)
=(a+x)^n(b+x)^n-1*[(a+x)-(b+x)]
=(a+x)^n(b+x)^n-1*(a-b)
不懂还可问,满意请及时采纳!o(∩_∩)o
追问
9xy(x-y)(x+1)-3y(x-y)(3x+2Y)+6y^2(x-y)(x+1)其中x=1/3 y=2
追答
9xy(x-y)(x+1)-3y(x-y)(3x+2Y)+6y^2(x-y)(x+1)
=3y(x-y)*3x(x+1)-3y(x-y)(3x+2Y)+3y(x-y)*2y(x+1)
=3y(x-y)(3x²+3x-3x-2y+2xy+2y)
=3y(x-y)(3x²+2xy)
=3xy(x-y)(3x+2y)
再将x=1/3 y=2代入,
原式=3xy(x-y)(3x+2y)
=3×1/3×2×(1/3-2)×(3×1/3+2×2)
=﹣50/3
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