Mathematics
Junior High
⑶の解き方が分かりません。
答えは(x+2y)(x－2y－1)です。
次の式を因数分解しなさい。
(1) 4a²x-166² x
VA (2) a² (56-3) +4 (3-56)
(3)
x²-4y²-x-2y
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