B1 a,làm phép chia:( x^2 + 2x+ 1 ):(x+1) b, Rút gọn biểu thức (x+y)^2 - (x-y)^2-4(x-1)y B2phân tích đa thức thành nhân tử a,x^2 +3x+3y+xy b,x^3+5x^2+6x B3: Cho bt Q=x+3/2x+1 - x-7/2x+1 a, Thu gọn bt Q b, Tìm giá trị nguyên của x để Q nhận giá trị nguyên

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