Mathematics
Senior High
Solved
①の解き方が知りたいです🙇🏻♀️´-
お願いします
19
=9-67+7
= 16-67
⑦a=3-√5 b=3+√5のとき、次
(1) a2-2a-3
(2
a
-39
-3
a
+(a
=2a
= (a-3)(a+1)
=(3-√5-3)(3-√5+1)
=(-15) (4-1)=4-255
(3) a 2-b2
=
(4
分配
(a+b) (a+b) (7) 12
= (3 - √5 +3 + √5) (3-√5+ 3-√5)
=(6)(-2)
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