Mathematics
Senior High
あってますか?
11
① (atb-c)
(A-C)
= A*-2AC+Cと
=atー2(at)c+
a+2a6+6-20-26C+C
(ス+2+32)
(At32)
A+6ZA+92
(228)+62(ス2ま)
122+922
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