Mathematics
Junior High
Resolved
十番ってどうやって解くか教えてください
(10) a²-b²+2bc-c²
=a²=-(b²-2bc+c²²)
=a-(b+c)(b-c)
(2) 2b(x-4) (x + 2)
(4) 2y(x+2y) (x - 2y)
-2(a-5)(a - 2)
(6)
(8) (a-1)(b + 1)
(10) (a+b-c) (a-b+c)
(1
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