七年级数学,求解,必采纳,在线等,急急急急急

2024-12-23 04:27:46
推荐回答(4个)
回答1:

回答2:

(x-1)(x+3)-2(x-5)(x-2)
=x^2-x+3x-3-2(x^2-5x-2x+10)
=x^2-x+3x-3-2x^2+10x+4x-20
=-x^2+16x-23

回答3:

看不到图啊,

回答4: