每日一题7-31公开课

8.已知:cr +6a+b2 - 10Z?+34 = 0,求代数式(2。+/?) (3a-2b)+4〃/?的值.1 9 1. (1)已知加2_ 3m+1=0,求加+一的值.(2)已知机2 _ 51=0

腾讯文库每日一题7-31公开课每日一题7-31公开课