Mathematics
Senior High
途中式からなんですけど上からどういう考えで2個目から3個目に式を変形しているのか教えてください
y³)
440 27
=r+r-(y2–5y+6)
=x²+x-(y-2)(y-3)
\c={x+(y-2)}{x-(y-3)}
=(x+y-2)(x-y+3)
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