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nguyenngocyennhi
2 năm trước
`\text{Bài 8 : phân tích đa thức thành nhân tử }`$\\$`a) 2x + 4y`$\\$`b)1/4 x^2 + xy + x`$\\$`c)x^2y + 2xy + xy^2`$\\$`d)x(y+ 1) - 2y(y - x)`$\\$`e)x^2(y + x) - y(x + y)`$\\$`f)x(y - x) + 2y (y - 1)`$\\$`\text{Bài 9 : tính giá trị biểu thức}`$\\$`a)15 . 80,5 + 15 . 19,5`$\\$`b)16 . 101,5 - 16 . 1,5`$\\$`c)28 . 92,5 + 280 . 0,75`$\\$`d)110 . 102,9 - 1100 . 0,29`
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