初二数学题:已知a+b=3⼀2,ab=1,求(a-2)(b-2)的值

2025-02-24 12:36:26
推荐回答(4个)
回答1:

(a-2)(b-2)
=ab-2a-2b+4
=ab-2(a+b)+4
=1-2(3/2)+4
=2

回答2:

(a-2)x(b-2)=ab-2a-2b+4=1-2x3/2+4=2

回答3:

(a-2)(b-2)
=ab-2a-2b+4
=ab-2(a+b)+4
=1-(3/2)*2+4
=5-3
=2

回答4:

2