㎡+9m=7,m等于多少?

㎡+9m=7,m等于多少?
2025-05-14 07:48:17
推荐回答(2个)
回答1:

㎡+9m=7
(m+4.5)²=7+4.5²
m+9/2=±√(7+81/4)
m1=-9/2+√109/2
m2=-9/2-√109/2

回答2:

用求根公式即可