TOÁN 08 (7 Hằng đẳng thức)

Quiz
•
Mathematics
•
8th - 12th Grade
•
Hard
Johnson _vs
Used 29+ times
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Khai triển (3x-4y)2 ta được
9x2-12x+16y2
9x2-24x+16y2
9x2-6x+16y2
-9x2+12x-16y2
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Viết biểu thức 25x2-20xy+4y2 dưới dạng bình phương của một hiệu
(5x-4y)2
(5x+2y)2
(2x-5y)2
(2y-5x)2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tìm x, biết (2x-10)2=0
x=5
x=-2
x=-5
x=2
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Tìm x, biết: (x-2)2-4=0
x=4 hoặc x=0
x=4 và x=0
x=2 hoặc x=0
x=2 và x=0
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Giá trị của biểu thức: (2+x)(x-2) - (x2-2x+4)
2x
-2x2+2x+8
-2x-8
-2x
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Tìm x, biết: x(5-2x)-2x(1-x)=15
x=5
x=-5
x=3
x=-3
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
khai triển x3-8 ta được:
(x-2)(x2+4x+4)
(x+2)(x2+2x+4)
(x+2)(x2-2x+4)
(x-2)(x2+2x+4)
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