Bài 1. Tính a) 3x(2x – 5) b) (x+1)(x + 4) c) (7 – x)( x + 7) d) ( + 2)2 e) (3 – 2x)2 f) (x – 2)(x2 + 2x + 4) Bài 2. Phân tích các đa thức sau thành nhân tử: a) 2−19 b) 2−2+ 2 - 100 c) xz + yz - 5(x + y)

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asked Jan 24, 2022 71.0k views

2 votes

Bài 1. Tính

a) 3x(2x – 5)

b) (x+1)(x + 4)

c) (7 – x)( x + 7)

d) ( + 2)2

e) (3 – 2x)2

f) (x – 2)(x2 + 2x + 4)

Bài 2. Phân tích các đa thức sau thành nhân tử:

a) 2−19

b) 2−2+ 2 - 100

c) xz + yz - 5(x + y)

d) 2+3++3

Bài 3. Tìm x biết:

a) 4x2 - 12x = 0

b) x2 – 5x = 0

c) x(2x – 7) + 4x – 14 = 0

Mathematics
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Tenor asked

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1 Answer

4 votes

F F F F F F F F F F F F F

Step-by-step explanation:F f

Khargoosh answered Jan 28, 2022

by Khargoosh

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