Mathematics
Junior High
Solved
+3と-4は、-12を分けたものだと思うんですけど、どうして分けたんですか?
(3) x²-2xy + y²-x+y-12
=(x-y)²-(x-y)-12 (3) (
= {(x-y)+3} {(x-y)-4)
=(x-y+3) (x-y-4)
5+11-
答 (x-y+3)(x-y-4)
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