Mathematics
Senior High
なぜこのような式変形になるのか教えてください
*27 次の式を計算せよ。
1
x(x-1)+(x-1)(x-2)+(x-2)(x-3)
別解
27 与式=
=(1/11)+(x-2
x-1
1
1
+1
x-3 x-2
1
1
x-(x-3)
3
x-3
x
x(x-3)
x(x-3)
KI
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