配套习题- 用因式分解法解一元二次方程 -【青果学院】

1/5单选题

难度：

1.方程(x－16)(x＋8)＝0的根是()

A	x₁＝－16，x₂＝8
B	x₁＝16，x₂＝－8
C	x₁＝16，x₂＝8
D	x₁＝－16，x₂＝－8

正确答案：Qg==

6Kej562U77yaPGltZyB3aWR0aD04IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzNFL0VBL3JCQUNKMVRJbkpPVDNzWTRBQUFBeFlUU1IzQTY4My5wbmciPih477yNMTYpKHjvvIs4Ke+8nTA8YnI+4oi0eDxzdWI+MTwvc3ViPu+8nTE277yMeDxzdWI+Mjwvc3ViPu+8ne+8jTg8YnI+5pWF6YCJQg==

2/5单选题

难度：

2.方程5x(x＋3)＝3(x＋3)解为()

A	x₁＝，x₂＝3
B	x＝
C	x₁＝－，x₂＝－3
D	x₁＝，x₂＝－3

正确答案：RA==

6Kej562U77ya4oi1IDV4KHjvvIszKe+8nTMoeO+8izMp5Zug5byP5YiG6Kej5Li6PGJyPiA8aW1nIHdpZHRoPTk2IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzczLzIwL3JCQUNFMVRJbkphU2FJYlVBQUFDSURlRXZkRTg0MC5wbmciPj0wPGJyPjxicj7iiLTljp/mlrnnqIvnmoTkuKTkuKrop6PkuLp4PHN1Yj4xPC9zdWI+77ydPGltZyB3aWR0aD0xNiBoZWlnaHQ9NDAgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8zRS9BQy9yQkFDSmxUSW5KYWpHLVJSQUFBQlpxZWctbm81NjIucG5nIj7vvIx4PHN1Yj4yPC9zdWI+77yd77yNMzxicj4=

3/5单选题

难度：

3.方程(x－1)²－4(x＋2)²＝0的根为()

A	x₁＝1，x₂＝－5
B	x₁＝－1，x₂＝－5
C	x₁＝1，x₂＝5
D	x₁＝－1，x₂＝5

正确答案：Qg==

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

4/5单选题

难度：

4.已知三角形两边长为4和7，第三边的长是方程x²－16x＋55＝0的一个根，则第三边长是( )

A	5
B	5或11
C	6
D	11

正确答案：QQ==

6Kej562U77ya4oi1IHg8c3VwPjI8L3N1cD7vvI0xNnjvvIs1Ne+8nTDlm6DlvI/liIbop6PkuLo8aW1nIHdpZHRoPTEyMiBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8zRS9BQy9yQkFDSmxUSW5KeWhjNnhZQUFBQ1F1amdKR1U2ODAucG5nIj48YnI+4oi0PGltZyB3aWR0aD0xMTggaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvQUMvckJBQ0psVEluSnlTSGdURkFBQUI3bkVBV3pZMTUxLnBuZyI+PGJyPuS4ieinkuW9ouS4pOi+uemVv+S4ujTlkow377yM5qC55o2u5LiJ6KeS5b2i5Lik6L655LmL5ZKM5aSn5LqO56ys5LiJ6L65PGJyPuaJgOS7peesrOS4iei+ueWPquiDveS4ujU8YnI+5pWF6YCJQTxicj4=

5/5单选题

难度：

5.三角形的两边长分别是3和6，第三边是方程

的解，则这个三角形的周长是（）

A	11
B	13
C	11或13
D	11和13

正确答案：Qg==

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