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问题: 急急急~初二数学

1. (a-b)(a^5+a^4 b+a^3 b^2+a^2 b^3+a b^4+b^5)
2. (2x-1)(16x^4+8x^3+4x^2+2x+1)

解答:

1. (a-b)(a^5+a^4 b+a^3 b^2+a^2 b^3+a b^4+b^5)
=a^6+a^5b+a^4b^2+a^3b^3+a^2b^4+ab^5
-a^5b-a^4b^2-a^3b^3-a^2b^4-ab^5-b^6
=a^6-b^6

2. (2x-1)(16x^4+8x^3+4x^2+2x+1)
=32x^5+16x^4+8x^3+4x^2+2x
-16x^4-8x^3-4x^2-2x-1
=32x^5-1