đề kiểm tra 1 tiết học kỳ 2 môn toán lớp 8 (1)

TR NG THCS LÊ IƯỜ ỢH và tên:……………………………ọL 8:……ớ BÀI KI TRA 45 PHÚTỂMôn (Ti 55)ạ Th hai ngày 05 tháng 03 năm 2018ứ Đi mể phê th giáo, cô giáoờ ầĐ bài:ềCâu (6,0đi m):ể Gi các ph ng trình sau: ươa) 5x 0b)2x−86−3x+14=9x−28+3x−112 c) (4x 10)(20 5x) d) (x 2)(3 4x) 4x e)x+1x−1−x−1x+1=4x2−1f)- =-- +2 22 4x(x 5)x 25 5xCâu (3,0 đi m):ể Gi bài toán ng cách ph ng trình:ả ươ ng đi xe máy trung bình 40 km/hộ ườ Lúc ng ườy đi trung bình 30km/h, bi ng th gian đi 3gi 30 phút. ờTính quãng ng AB.ườCâu (1,0 đi m)ể Gi¶i ph ¬ng tr×nh sau:(2x 1)(x 1) 2(2x 3) 0Bài 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