Mathematics
Junior High
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練習21 次の式を因数分解せよ。
a ³l ah² + b²c
(1) ab(a - b) + bc(b-c)+ca(c-a)
= (h-C) α² + (C²h²) a + hc (h-c)
(h-c) {^² - (htc) a the}
(h-c) (a-h) (^_c.)
= - (α-h) (h_c) (c-α))+
二
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