题目内容
计算:
(1)﹣(x3)2·(x2)3;
(2)(x+2)2﹣(x﹣1)(x+1).
(1)﹣(x3)2·(x2)3;
(2)(x+2)2﹣(x﹣1)(x+1).
解:(1)﹣(x3)2·(x2)3
=﹣x6·x6
=﹣x12;
(2)(x+2)2﹣(x﹣1)(x+1)
=x2+2x+4﹣x2+1
=4x+5.
=﹣x6·x6
=﹣x12;
(2)(x+2)2﹣(x﹣1)(x+1)
=x2+2x+4﹣x2+1
=4x+5.
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