Question

あ

青のところ教えてください

=(a°-6)(a-c)
(2) a
=(a+b)(a-b)(a-c)
(2) 与式=2x°+(-3y+7)x+(y?-4y+3)
=2x+(-3y+7)x+(y-1)(y-3)
={x-(y-3)}{2.x-(y-1)}
xについて整理す
解答(1)(x
1
2
=(x
(y-1)(y-3)
=(x
2
=(x-y+3)(2.xーy+1)
-y
(2) a
- yについて整理す
別解 与式=y°+(-3x-4)y+(2x°+7x+3)
=y+(-3x-4)y+(x+3)(2x+1)
=(y-(x+3)}{y-(2.x+1)}
=(y-x-3)(y-2.x-1)
=(x-y+3)(2.x-y+1)
一
X
→ース
1
B
次の式を
46(1) x
*(3)(エ
■ 次の式を因数分解せよ。 [42~45]
2 42 *() -+x+1
(2) 27xy*-12xy
* x'y-10x°y?_56xy°
*a'(a-b)+96°(6-a)
*(7) 9x°+6xy+y°-25
(4) 3a*b-4a°がーα6
V(x+y)°-x-y-2
x-y-4y-4
xy?-x+y-1
x°-2xy+4x-2y+3
ab°-6°c-c'a+bc° 例題9
48(1) c
243 (1) xy-x-y+1
x+xy+2x-y-3
a-2a°b+26-a
2 44 *(1) x-(3y+4)x+(y+5)(2y-1)
*(3) x+2xy+y°-4x-4y+3
*(5) 2x°+3xy-2y?-5x-5y+3
(2) a+(26+5)a-(b-4)(36+1) 49 *(1)
(4) x-xy-6y?+2x+19y-15
(6) 6x°-5xy+y?ーx+y-2
例題9|
50 (1)
63(2)
B Clear
2 45(1) x-4xy+4y°-4z°
(2) 2a°6-3ab+a-26-2
(3) x-5xy+6y°+2x-7y-3
(4) ?r°-r-12-3x-3y-2
TII|