Đê cương ôn tập (Covid-19) - Môn Toán Lớp 8

ĐỀ CƯƠNG ÔN TẬP (COVID-19) MÔN: TOÁN 8

Bài 1. Giải các phương trình sau (Phương trình quy về dạng ax + b = 0)

a) 3x + 1 = 7x – 11 b) 2x + x + 12 = 0 c) 5 – 3x = 6x + 7 d) 11 – 2x = x – 1

e)

f)

Bài 2. Giải các phương trình sau: (Phương trình tích) a) (x+2)(x - 4) =0 b) (3x – 5)(x + 3) = 0 c) 4x2 – 6x = 0 d)(3x – 2)(4x + 5) = 0 e) (2x + 7)(x – 5)(5x + 1) = 0 Bài tập nâng cao: HS giỏi làm.

a)

c) d) x2 – 3x + 2 = 0

BÀI LÀM

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2

x 3 5 3

2 x 5   

2 3 5 4 3 2 x x   

x 2 3 5 6

1 x 3 2

2 x 3     

5 2 3 6 1 2 1 ) 4 3 8 12 x x x x b       

2

2 x 3 x 4 x 5

4 x      

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