Mathematics
Senior High
Resolved

1~3教えてください!
お願いします!

Answers

✨ Best Answer ✨

(1)
 (x-1)(x-5) = x²-6x+5
 (x-2)(x-4) = x²-6x+8
  なので (x-1)(x-5)(x-2)(x-4) = {(x-1)(x-5)}{(x-2)(x-4)}
                = (x²-6x+5)(x²-6x+8)

(2)
 x²-6x+7 = 0 を解くと x = 3±√2 となるので

 x = 3+√2 のとき x²-6x+7 = 0

(3)
 P = (x²-6x+5)(x²-6x+8) = {(x²-6x+7)-2}{(x²-6x+7)+1} = (0-2)(0+1) = -2

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