Mathematics
Senior High
赤の矢印になるわかりやすい説明をお願いします
1 (1) (x+1)(x-2)(x+3)(x-4)+24= {(x²-x)-2}{(x²-x)-12)+24
=(x_x)-14(xx) +24 +24
=(x-x)-14(x-x) +48
=((x²-x)-6}(x2-x)-8)
=(x+2)(x-3)(x2-x-8)
2
(2) (x²-4x+3)(x²-12x+35)-9=(x-1xx-3xx-5Xx-7)-9
=(x-1Xx-7)x(x-3)x-5)-9
={(x²-8x)+7}{(x²-8x)+15)-9
=(x²-8x)²+22(x²-8x)+105-9
=(x²-8x)²+22(x²- 8x)+96
={(x²−8x)+6}{(x²- 8x)+16}
=(x-4)(x²-8x+6)
G
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