翰林國中數學2上CH4-2 配方法與公式解

翰林國中數學2上CH4-2 配方法與公式解

8th Grade

10 Qs

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翰林國中數學2上CH4-2 配方法與公式解

翰林國中數學2上CH4-2 配方法與公式解

Assessment

Quiz

Mathematics

8th Grade

Medium

Created by

翰林數學 翰林數學

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

下列解方程式 (2x+1)236=0\left(2x+1\right)^2-36=0 的過程,哪一步驟開始出現錯誤

步驟一: (2x+1)2=36\left(2x+1\right)^2=36  

步驟二: 2x+1=±62x+1=\pm6  

步驟三: 2x=1±62x=1\pm6  

步驟四: x=7x=7  5-5 

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

解方程式 (x3)2=5\left(x-3\right)^2=5 的結果為下列何者?

 x=8x=8  2-2 

 x=3±5x=3\pm\sqrt{5} 

 x=3±5x=-3\pm\sqrt{5} 

 x=8x=-8  22 

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

下列何者不是完全平方式?

 x2+22x+121x^2+22x+121  

 x26x+9x^2-6x+9  

 25x210x+125x^2-10x+1  

 x2+x+1x^2+x+1  

4.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

 (3x+7)210=3\left(3x+7\right)^2-10=3 ,則 3x+73x+7 之值為何?

 1313  

 ±13\pm13  

 13\sqrt{13}  

 ±13\pm\sqrt{13}  

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

方程式 5x2=05x^2=0 的根為何?

 00  

 55  

 5-5  

無解

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

已知 x2+ax+1x^2+ax+1 可以配成完全平方式,求 aa 之值為何?

 ±1\pm1  

 ±12\pm\frac{1}{2}  

 ±2\pm2  

 ±4\pm4  

7.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

解方程式 49x2=2549x^2=25 的解為下列何者?

 x=±1x=\pm1  

 x=±75x=\pm\frac{7}{5}  

 x=±57x=\pm\frac{5}{7}  

 x=00x=0、0  

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