2021_F2_Maths_CH2 恆等式
Quiz
•
Mathematics
•
7th - 8th Grade
•
Practice Problem
•
Hard
shun lin
Used 51+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
展開 (x-2y)(x+2y)。
x2-5xy +6y2
x2+xy -6y2
x2-4y2
x2+6y2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
展開 (4x-y)(4x+y)。
4x2-16xy -4y2
16x2- y2
4x2-15xy +y2
x2- 4y2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
展開 2 (x-y)(x+y)。
3x2- 5y2
3x2-14xy +5y2
2x2-2y2
6x2-28xy -10y2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
已知 (x+4)(3x-1) = Ax2 +Bx-4為恆等式,計算A及B的值。
A= 1 , B=12
A= 3 , B=13
A= 3 , B=11
A= 4 , B= -4
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
已知 (2x-5)(x-4)-3x = 2x2 +Ax- B為恆等式,計算A及B的值。
A = 13 , B=20
A = -13 , B= -20
A = 16 , B= 20
A = -16 , B= -20
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
利用完全平方的恆等式,展開(3x-7)2。
3x2-21x -49
3x2-21x +49
9x2-42x +49
9x2-42x -49
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
利用完全平方的恆等式,展開 (2x-5y)2。
4x2-10xy-25y2
4x2-20xy+25y2
2x2-10xy-25y2
4x2-10xy-5y2
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