Toán Lớp 8: x^2-4xy-z^2+4y^2 phân tích nhân tử
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Toán Lớp 8: x^2-4xy-z^2+4y^2 phân tích nhân tử
Comments ( 2 )
=(x^2-4xy+4y^2)-z^2
=(x-2y)^2-x^2
=(x-2y-z)(x-2y+z)