x²-8a+2ax-16
aについて
整理
= (2x-8) a + (x²-16)
= (-2x-8) a tcx + 4) (x-4)
= ( − 2 x 8 ) a t ( X 14 ) ( x 1 23 (X-22
= 20-x-92 a 1 C x 14 ) C X12)(x-2)
= (2-4) (2 +2α +4),
za
(3) 4-4y+2xy-x²
3- 12 5 11
を整理
(2x-4) ³ -(x²-4)
= (22-925-C2123(2-27
-(x-2)(x+2312) 1
(4) a²b+a-b-1
(a-1) (ab tb +1)/
²0²+b
*
a²+b²+ bc-ca-2ab
= (α-b>(α-b-c)