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

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

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

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)

  1. (x-2)(x+2)-(x+1)(x-3)

        =x平方-4-(x平方-2x-3)

        =2X-1

2..(-1/2x)^7/(-1/2x)

    =(-1/2x)^6

    =x^6/64

(1)2x-1
(2)1/64x^6