Mathematics
Junior High
Resolved
⑺の赤字の答えになる理由を教えて欲しいです！
なにを間違えているかわかりません🙇
-22-6x +ay+ab
(7) (4+aX9-b)
= 36-4b+9a-ab
= -4b +9a-ab +36
=
(9) (6x+5)(8y-3)
30
48x²7-182 +407 -15
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