㎡-m-1=0

2024-12-01 03:05:00
推荐回答(3个)
回答1:

㎡-m-1=0
解:配方得:
㎡-m+1/4-1/4-1=0
(m-1/2)²=5/4
开方得:
x-1/2=±√(5/4)
x=2分之(1±√5)

回答2:

m²-m-1=0
m²-m=1
m²-m+1/4=1+1/4
(m-1/2)²=5/4
m+1/2=±√5/2
m1=(√5-1)/2, m2=(-√5-1)/2

回答3:

㎡-m-1=0
解:配方得:
㎡-m+1/4-1/4-1=0
(m-1/2)²=5/4
开方得:
x-1/2=±√(5/4)
x=2分之(1±√