3a平方-5a+7-(-2a方+6a-4)去括号得多少
问题描述:
3a平方-5a+7-(-2a方+6a-4)去括号得多少
答
3a平方-5a+7+2a方-6a+4=5a平方-11a+11
答
5a^2-11a+11
答
3a平方-5a+7-(-2a方+6a-4)
=5a^2-11a+11
答
3a平方-5a+7-(-2a方+6a-4)
=3a^2-5a+7+2a^2-6a+4
=5a^2-11a+11