1.[(x-y)^2-2(y -x)]÷(x-y)2.[(3a-7)^2-(a+5)^2]÷(4a-24)3.(1-16^4)÷(_数学解答

1.[(x-y)^2-2(y -x)]÷(x-y)
2.[(3a-7)^2-(a+5)^2]÷(4a-24)
3.(1-16^4)÷(4x^2+1)÷(2x+1)
4.(x+y)^3-2(x+y)^2+(x+y)
5.a(x-y)-a^2(y-x)

人气：459 ℃　时间：2020-01-27 08:38:15

解答

1.[(x-y)^2-2(y -x)]÷(x-y)=[(x-y)^2+2(x-y)]÷(x-y)=(x-y)(x-y+2)÷(x-y)=x-y+22.[(3a-7)^2-(a+5)^2]÷(4a-24)=(3a-7+a+5)(3a-7-a-5)÷4(a-6)=(4a-2)(2a-12)÷4(a-6)=4(2a-1)(a-6)÷4(a-6)=2a-13.(1-16^4)÷(4x^2+...