1 m=36,n=-6
m-n=42,選C
2 B沒法解釋,不行就展開比較一下~
1.若x²-12x+m=(x+n)²,則m-n=
1.若x²-12x+m=(x+n)²,則m-n=
a.30 b.36 c.42 d.48
2.用配方法解一元二次方程x²-2x-m=0配方后的方程是
a.(x+1)²=m²+1
b.(x-1)²=m-1
c.(x-1)²=1-m
d.(x-1)²=m+1
a.30 b.36 c.42 d.48
2.用配方法解一元二次方程x²-2x-m=0配方后的方程是
a.(x+1)²=m²+1
b.(x-1)²=m-1
c.(x-1)²=1-m
d.(x-1)²=m+1
數(shù)學(xué)人氣：710 ℃時(shí)間：2020-06-06 18:58:37
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