Họ và tên .................................................................. kiểm tra đại số 9 chươg iii 1
Lớp ............................. ( Thời gian 45 phút )
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Câu 1) (3 điểm) Giải các phương trình sau:
a) b)
Câu 2) (2 điểm) Tì m a để hệ phương trình sau có nghiệm duy nhất :
Câu 3) (5 điểm) Hai địa điểm Avà B cách nhau 200 km . Cùng một lúc một xe máy đi từ A và một ô tô đi từ B Xe máy và ô tô gặp nhau tại địa điểm C cách A 120 km . Nếu xe máy khởi hành sau
ô tô một giờ thì sẽ gặp nhau tại địa điểm D cách C 24 km . Tính vận tốc của ô tô và xe máy ?
Bài làm
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Họ và tên .................................................................... kiểm tra đại số 9 chươg iii 2
Lớp ...................................... ( Thời gian 45 phút )

Câu 1)(3 điểm) Giải các phương trình sau:
a) b)
Câu 2) (2điểm) Tì m k để hệ phương trình sau có nghiệm duy nhất :
Câu 3 (5 điểm) Hai ca nô cùng khởi hành từ hai địa điểm A và B cách nhau 85 km và đi ngược chiều nhau . Sau 1 giờ 40 phút thì gặp nhau . Tính vận tốc thực của mỗi ca nô , biết rằng vận tốc ca nô đi xuôi dòng lớn hơn vận tốc ca nô đi ngược dòng là 9 km và vận tốc dòng nước chảy là 3 km/h
Bài làm
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Họ và tên .................................. kiểm tra đại số chươg iii
Lờp .............. ( Thời gian 45 phút )
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Câu 1) Giải các phương trình sau:
a) b)
c) x3 + 5x2+3x - 9 = 0
Câu 2) Tì m m để phương trình sau có nghiệm x = 2
2(3x + m )( x + 2) - 2(3x + 1) = 18
Câu 3) Một người đi xe đạp từ A đến B với vận tốc 15 km/h ; lúc quay về với vận tốc 12 km/h
nên thời gian về nhiều hơn thời gian đi là 45 phút . Tính quảng đường AB ?
Bài làm