计算; 1.(x-2)(x+2)-(x+1)(x-3) 2.(-1/2x)^7/(-1/2x)

问题描述:

计算; 1.(x-2)(x+2)-(x+1)(x-3) 2.(-1/2x)^7/(-1/2x)

1.(x-2)(x+2)-(x+1)(x-3)
=x²-4-x²+3x-x+3
=2x-1
2.(-1/2x)^7/(-1/2x)
=(-1/2x)^(7-1)
=(-1/2x)^6
=1/(64x^6)