49 次の式を因数分解せよ。 8+ (ト+ス+ (1)* a(b-c)?+b(c-a)?+c(a-b)?+8abc ala-2actc)te(c=2acta)tclat 2chtム)+8aaC ニ (4+で) c* 2cata's)t Gca-2ah t G)tspe -20c tacうac+aitaで-20ht8aaC+(ac ta'c. aeit7aact act aiat aic-2c2チ&C1eie) a(at actcth+C)+hiccatC.-2c ). - a(e+4ac+htctC) (2)(a+b-c)(ab-bc-ca) + abc す2a.lc+at ass-282t2cf 8au.c こ ミ 98-(8-8-u ニ (ataxetC)(C+a) de-amc-dict aeac-apc -dec t.ac?+actabc - (a-c)+a(α?-1ec-14c+C?iec)+ ecCe-c) = 0(a-c)taca- 24ctC)+ec (a-C) - a' (a-c)ta(a-c)tac(a-) (ac)cataすeく S -Cata)ce-c)(c-a) ニ 2 2 ミ こ 00 D H

(3) ab(a+b)+bc(b+c)+ca(c+a)+3abc aatarite?cteac?+ a'(etc)+ala? tcf3ac)+ec(のtC) ac'tact3aenc 2 2 = aMtaCa'tC?t3ac) +lac M MCateac)ta (at3&c tC?) ミ 2 (litc)ca'tec)tale't3actc) 2 Catatc)cantlct Ca)