Mathematics
Junior High
解説お願いします🙇♀️🙇♀️
(7) a(b+8)-
a(A-A)
(8) (3x+1)-2(3x+25)
(3x+9) (3x-7)
(9) (x-4)²+2(x-2)-3
(10) ab²-2ab-2b+4
(b-2) (ab~2)
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