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S2 CH2 持續評估 (2020-2021)

Authored by Wing Cheung

Mathematics

8th Grade

Used 22+ times

S2 CH2 持續評估 (2020-2021)
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10 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

考慮方程

 4(32x)x=27(x+2)4\left(3-2x\right)-x=2-7\left(x+2\right)  。
它是否恆等式?

無從判斷

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

展開

 (p4q)2\left(p-4q\right)^2 

 p24q2p^2-4q^2  

 p216q2p^2-16q^2  

 p28pq+16q2p^2-8pq+16q^2  

 p2+8pq+16q2p^2+8pq+16q^2  

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 (2x+5y)2\left(2x+5y\right)^2 

 4x2+25y24x^2+25y^2  

 2x2+10xy+5y22x^2+10xy+5y^2  

 4x2+10xy+10y24x^2+10xy+10y^2  

 4x2+20xy+25y24x^2+20xy+25y^2  

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

展開 (3x8y)(8y+3x)-\left(3x-8y\right)\left(8y+3x\right)  。

 3x2+8y2-3x^2+8y^2  

 3x28y23x^2-8y^2  

 9x2+64y2-9x^2+64y^2  

 9x264y29x^2-64y^2  

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

展開 ((12x2y)2)\left(\left(1-2x^2y\right)^2\right)  。

 14x2y1-4x^2y  

 14x2y2+4x2y1-4x^2y^2+4x^2y  

 4x4y24x2y+14x^4y^2-4x^2y+1  

 4x4y214x^4y^2-1  

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

 A(x4)2(x+2)(x2)x2+Bx+36A\left(x-4\right)^2-\left(x+2\right)\left(x-2\right)\equiv x^2+Bx+36  ,求 (A+B) 的值。

-16

-14

-8

2

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

考慮方程 x+232x34=72x12\frac{x+2}{3}-\frac{2x-3}{4}=\frac{7-2x}{12}  。它是否恆等式?

無從判斷

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