配套习题- 怎样灵活选择方法解一元二次方程（一） -【青果学院】

1/5单选题

难度：

1.用直接开平方法解方程（x-3）²=8，得方程的根为（）

A
B
C
D

正确答案：Qg==

PGRpdj7op6PvvJriiLU8aW1nIHdpZHRoPTc4IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzE1LzIyL3JCQUNFMU1IT1dheENvbmdBQUFCLVJlNnFxdzMwOC5wbmciPjwvZGl2PjxkaXY+4oi0PGltZyB3aWR0aD04NSBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9GMi82Mi9yQkFDRkZNSE9XYlJsWTlrQUFBQ0VtV1JXZk00OTkucG5nIj4sPC9kaXY+PGRpdj7iiLQ8aW1nIHdpZHRoPTE2NiBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9GMi82Mi9yQkFDRkZNSE9XYlI0OW85QUFBQ3BWak5fcGcwNTAucG5nIj48L2Rpdj48ZGl2PuaVhemAiUI8L2Rpdj4=

2/5单选题

难度：

2.一元二次方程

＝0的根（）

A
B
C
D

正确答案：RA==

PGRpdj7op6PvvJrljp/mlrnnqIvlt6bovrnphY3mlrnvvIzlvpc8aW1nIHdpZHRoPTg2IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzE1LzIyL3JCQUNFMU1IT1d6U2EzYzJBQUFDWWhpOWxSNDMyNy5wbmciPiw8L2Rpdj48ZGl2PuKItDxpbWcgd2lkdGg9NzkgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvRjIvNjIvckJBQ0ZGTUhPV3p6U09JekFBQUI1RU9HREtRMDcxLnBuZyI+PC9kaXY+PGRpdj7mlYXpgIlEPC9kaXY+

3/5单选题

难度：

3.一元二次方程x²-4x+3=0的解是（）

A
B
C
D

正确答案：RA==

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

4/5单选题

难度：

4.方程

的两根为（）

A
B
C
D

正确答案：QQ==

PGRpdj7op6PvvJo8aW1nIHdpZHRoPTk1IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzE1LzIzL3JCQUNFMU1IT1hpaVZCOFdBQUFCN0YwQ21PSTA2Mi5wbmciPjwvZGl2PjxkaXY+PGltZyB3aWR0aD0xMTIgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMTUvMjMvckJBQ0UxTUhPWGp5cU84ZUFBQUNMMElQNko0NDI2LnBuZyI+PC9kaXY+PGRpdj7op6Plvpc8aW1nIHdpZHRoPTEwMyBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9GMi82My9yQkFDRkZNSE9YaXppQm14QUFBQjlEY2w5dEU0MjQucG5nIj48L2Rpdj48ZGl2PuaVhemAiUE8L2Rpdj4=

5/5单选题

难度：

5.方程

的解是（）

A
B
C
D

正确答案：Qw==

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