m(x+y) 2次 - 4m(x-y)2次
比埋步驟 thx!!!! 好急
更新1:
無個岩呀 大佬 =.= 正確答案是m(3x-y)(3y-x) 可以給我步驟嗎 謝謝大家
因式分解的數 help me!!!!
回答 (3)
2007-06-27 5:25 am
✔ 最佳答案
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2007-06-27 10:56 pm
m(x+y)^2-4m(x-y)^2
=m[(x+y)^2-{2(x-y)}^2]
=m{(x+y)^2-(2x-2y)^2}
=m(x+y+2x-2y)(x+y-2x+2y)
=m(3x-y)(3y-x)
=m[(x+y)^2-{2(x-y)}^2]
=m{(x+y)^2-(2x-2y)^2}
=m(x+y+2x-2y)(x+y-2x+2y)
=m(3x-y)(3y-x)
參考: me
2007-06-27 4:53 am
m(x︿2+y︿2) -4m(x ︿2 - y︿2)
=m(x︿2+y︿2)+ 4m(x︿2 +︿2)
=(x︿2 +︿2)(m+4m)
x︿2=x2次
=m(x︿2+y︿2)+ 4m(x︿2 +︿2)
=(x︿2 +︿2)(m+4m)
x︿2=x2次
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070626000051KK04133