计算3(a-2a-3)-5(-5a+a-2)

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计算3(a-2a-3)-5(-5a+a-2)计算3(a-2a-3)-5(-5a+a-2)计算3(a-2a-3)-5(-5a+a-2)=3a^2-6a-9+25a^2-5a+10=28a^2-11a+1

计算3(a-2a-3)-5(-5a+a-2)
计算3(a-2a-3)-5(-5a+a-2)

计算3(a-2a-3)-5(-5a+a-2)
=3a^2-6a-9+25a^2-5a+10=28a^2-11a+1

傻逼 这都做不来

=3a-6a-9+25a-5a+10
=28a-11a+1

原式=3a-6a-9+25a-5a+10
=17a+1