Toán Lớp 7: Tính
(2x + 3y)^2 + 2 (2x + 3y) + 1
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Toán Lớp 7: Tính
(2x + 3y)^2 + 2 (2x + 3y) + 1
Comments ( 2 )
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$=(2x+3y+1)^2$