分解因式:(m-n)(5ax+2ay-1)-(n-m)(3ay-ax+1) 急急急啊～～～快快

显示全部楼层 · 2013-1-14 20:18:40

..把后面的括号内的（n-m）提一个负号出来所以可改写成(m-n)(5ax+2ay-1)+(m-n)(3ay-ax+1) 然后就提公因式（m-n）（5ax+2ay-1+3ay-ax+1 ）=（m-n）（4ax+5ay）解题时应注意m-n的范围可能m=nmn...

千问 · 2013-1-14 20:18:40

(m-n)(5ax+2ay-1)-(n-m)(3ay-ax+1)=(m-n)(5ax+2ay-1)+(m-n)(3ay-ax+1)=(m-n)[(5ax+2ay-1)+(3ay-ax+1)]=(m-n)(4ax+5ay)=a(m-n)(4x+5y)...

千问 · 2013-1-14 20:18:40

(m-n)(5ax+2ay-1)-(n-m)(3ay-ax+1)=(m-n)[(5ax+2ay-1)+(3ay-ax+1)]=(m-n)(4ax+5ay)=a(m-n)(4x+5y)...

千问 · 2013-1-14 20:18:40

（m-n）(5ax+2ay-1+3ay-ax+1)=a(m-n)(4x+5y)...