1)(a-b)n=an-bn
2)(-5x+4y)2z= -10xz+8yz
3)-6x(5y-2x)
-6x•5y-6x•(-2x)
-30xy+12x²
4)(x²-x+1)x
x²•x-x•x+x
x³-x²+x
1)(a-b)n=an-bn
2)(-5x+4y)2z= -10xz+8yz
3)-6x(5y-2x)
-6x•5y-6x•(-2x)
-30xy+12x²
4)(x²-x+1)x
x²•x-x•x+x
x³-x²+x