1、(-2x)·(3x-1)-(x-1)^2 2、(x-y+1)^3·(y-x-1)^2·(x-y+1)^n+1 3、(-2)^3÷2^5÷(-1/2)^2+(-2)^2 4、(x-2y)(x+2y)-(x-2y)^2

1、(-2x)·(3x-1)-(x-1)^2 2、(x-y+1)^3·(y-x-1)^2·(x-y+1)^n+1 3、(-2)^3÷2^5÷(-1/2)^2+(-2)^2 4、(x-2y)(x+2y)-(x-2y)^2

1.원 식=-6x&\#178;+2x-x²+2x-1=-7x²+4x-1 이 건 2,원 식=(x-y+1)&\#179;*(x-y+1)²(x-y+1)^(n+1)=(x-y+1)^(3+2+n+1)=(x-y+1)^(n+6)3,원 식=-2^3÷2^5÷2^(-1)+4=-2^(3-5+1)+4=-1/2+4=7/24,원 식=(...