问题 计算题

计算:

(1)﹣(x32·(x23

(2)(x+2)2﹣(x﹣1)(x+1).

答案

解:(1)﹣(x32·(x23

=﹣x6·x6

=﹣x12

(2)(x+2)2﹣(x﹣1)(x+1)

=x2+2x+4﹣x2+1

=4x+5.

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