Mathematics
Senior High
Resolved
公式を何も省略せず丁寧に代入していったのに
答えが合いません
どこが違っていますか
(a-1) 3
= a³+3a² (-b).
3a x (-b)² +(-b) 3
a-3ab+3ab-b³
(3x-2y)3
=(3x)3+3×(3x)2×2%
3x3xx (2y)² - 8y3
=27x3+27x2x2y
36x42 -8y3
→27x3+54x2y+36xy2-843
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