(17h1-45)h1-(17h2-45)h2=0 怎么化简成 (17h1+17h2-45)(h1-h2)=0
题目
(17h1-45)h1-(17h2-45)h2=0 怎么化简成 (17h1+17h2-45)(h1-h2)=0
答案
(17h1-45)h1-(17h2-45)h2=0(17h1-45)h1+17h1h2-17h1h2-(17h2-45)h2=0[(17h1-45)h1+17h1h2]-[17h1h2+(17h2-45)h2]=0(17h1+17h2-45)h1-(17h1+17h2-45)h2=0(17h1+17h2-45)(h1-h2)=0...
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