■次の式を因数分解せよ。 [42~45]
(2) 27xy°-12.x°y
2 42*(1) -x?+x+1
*(3) x°yー10x°y?-56xy°
*(5)a(a-b)+96°(6-a)
*(7) 9x°+6xy+y°-25
(4) 3a*6-4a°6ーα6°
(6)(x+y)?-x-y-2
(8) x-y-4yー4
743(1) xyーx-y+1
(3) x°+xy+2x-y-3
*(2) xy?-x+yー1
*(4) x°-2xy+4x-2y+3
(5) α-2a°b+26-a
*(6) ab?-6°cーc'a+bc?
例題9(1)
(2) α+(26+5)a-(b-4)(36+1)
444 (1) x°ー(3y+4)x+(y+5)(2y-1)
*(3) x+2xy+y?-4x-4y+3
*(5) 2x°+3xy-2y?-5x-5y+3
(4) x-xy-6y?+2x+19y-15
(6) 6x°-5xy+yーx+y-2
例題9(2)
B Clear
Z 45 (1) x°ー4xy+4y°-42
(3) x-5xy+6y?+2x-7y-3
(2) 2a°b-3ab+a-2b-2
(4) 2x°-xy-y?-3x-3y-2
