化简：（5a2-2a）-（a2-5a+1）_爱下问搜题

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问题解答题

化简：（5a²-2a）-（a²-5a+1）

答案

（5a²-2a）-（a²-5a+1）

=5a²-2a-a²+5a-1

=（5a²-a²）+（-2a+5a）-1

=4a²+3a-1．

选择题

How did you make him _____? [ ]

A. stops taking

B. to stop to talk

C. stopped to talk

D. stop talking

问答题简答题

矫直机的形式有哪些？