Mathematics
Senior High
楽に計算できる方法を教えて欲しいです泣
答えは順番に16,81,8,72,18,と入ります
1 次の式を展開しなさい.
(1) (x+2y+3z) (-x+2y+3z) (x-2y+3z) (x+2y-3z)
=-x4- 12 y-
34
+
|67|
⑥67 y2z2+ 189
24+
22x2
15
x2y2
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