1 -4m^3+16m^2-26m

wang58jing2022-10-04 11:39:544条回答

1 -4m^3+16m^2-26m
2 5(x-y)^2+10(y-x)^2
3 25(a+b)^2-9(a-b)^2
4 x^5-x^3
5 x^2+2xy+y^2-4
6 6x-6y-9x^2+18xy-9y^2-1

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我的三围 共回答了18个问题 | 采纳率88.9%
1 -4m^3+16m^2-26m
=-4m*(m^2-4m+6.5)
2 5(x-y)^2+10(y-x)^2
=5(x-y)[(x-y)+2(y-x)]
=5(x-y)(y-x)
3 25(a+b)^2-9(a-b)^2
=[5(a+b)+3(a-b)][5(a+b)-3(a-b)]
=[8a+2b][2a+8b]
4 x^5-x^3
=x^3(x+1)(x-1)
5 x^2+2xy+y^2-4
=(x+y+2)(x+y-2)
6 6x-6y-9x^2+18xy-9y^2-1
=6(x-y)-9(x-y)^2-1
=-[3(x-y)-1]^2
1年前
喜蛋喜蛋 共回答了337个问题 | 采纳率
1 , -2m(2m^2-8m+13)
2, 1 5(x-y)(x-y)
3, [ 5(a+b)+3(a-b)][5(a+b)-3(a-b)]=(8a+2b)(2a+8b)=4(4a+b)(a+4b)
4, x^3(x^2-1)=x*x*x(x+1)(x-1)
5,(x+y)^2-4=(x+y+2)(x+y-2)
6, -(9x^2-18xy+9y^2-6x+6y+1)=-(3y-3x+1)(3y-3x+1)
1年前
wanshunbo 共回答了2个问题 | 采纳率
那是。。。。。。。。。。。。。。平方?
1年前
zybdd 共回答了16个问题 | 采纳率
1.-4m(m^2-4m-26/4)?这是比较简化的,可能不对。
2.5(x-y)^2+10(x-y)^2=15(x-y)^2 x-y y-x的绝对值相等,再括号的平方内可以换位置
3.25(a+b)^2-9(a-b)^2
= [5(a+b)]^2 - [3(a-b)]^2
= [5(a+b)+3(a-b)][5(a+b)-3(a-b)]
= (8a...
1年前

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