2021_F2_Maths_CH2 恆等式

2021_F2_Maths_CH2 恆等式

7th - 8th Grade

20 Qs

quiz-placeholder

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2021_F2_Maths_CH2 恆等式

2021_F2_Maths_CH2 恆等式

Assessment

Quiz

Mathematics

7th - 8th Grade

Hard

Created by

shun lin

Used 51+ times

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20 questions

Show all answers

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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