配套习题-一元二次方程概念 -【青果学院】

本课配套习题挑战模式1/5

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单选题

难度系数：

1.下列方程中是关于x的一元二次方程的是( )

A:

B: ax²+bx+c=0

C: (x-1)(x+2)=1

D: 3x²-2xy-5y²=0

提示1：5LiA5YWD5LqM5qyh5pa556iL55qE5a6a5LmJ77ya5b2i5aaCPGltZyB3aWR0aD0xNDkgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNzMvMUUvckJBQ0UxVEltalRCdlZ3dkFBQUN6bjJDQUEwODIzLnBuZyI+5b2i5byP77yM5ZCr5pyJ5LiA5Liq5pyq55+l5pWw77yM5LiU5pyq55+l5pWw55qE5pyA6auY5qyh5Li6MuasoeeahOaWueeoi+aYr+S4gOWFg+S6jOasoeaWueeoiw==
答案：Qw==
6Kej562U77yaQTxpbWcgd2lkdGg9NzcgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvRTkvckJBQ0oxVEltalREZEFjd0FBQUNUU0xFZVg0NTcyLnBuZyI+LOi/meaYr+WIhuW8j+aWueeoi++8jEIuIGF4PHN1cD4yPC9zdXA+K2J4K2M9MO+8jCBh55qE5YC85LiN56Gu5a6aIEMuICh4LTEpKHgrMik9MTxicj7ljJbkuLrkuIDoiKzlvI88aW1nIHdpZHRoPTkwIGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0FBLzI5L3JCQUNGRlRJbWpUajlnUFVBQUFCMDB3VF8yVTY5MS5wbmciPuaYr+S4gOWFg+S6jOasoeaWueeoizxicj5ELiAzeDxzdXA+Mjwvc3VwPi0yeHktNXk8c3VwPjI8L3N1cD49MCDlkKvmnInkuKTkuKrmnKrnn6XmlbA8YnI+5pWF6YCJQw==

本课配套习题挑战模式2/5

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单选题

难度系数：

2.若关于x的方程是一元二次方程

，则k的值为( )

A: ±2

B: 2

C: -2

D: -1

提示1：5LiA5YWD5LqM5qyh5pa556iL55qE5a6a5LmJ77ya5b2i5aaCPGltZyB3aWR0aD0xNDkgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNzMvMUUvckJBQ0UxVEltalRCdlZ3dkFBQUN6bjJDQUEwODIzLnBuZyI+5b2i5byP77yM5ZCr5pyJ5LiA5Liq5pyq55+l5pWw77yM5LiU5pyq55+l5pWw55qE5pyA6auY5qyh5Li6MuasoeeahOaWueeoi+aYr+S4gOWFg+S6jOasoeaWueeoiw==
答案：Qw==
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

本课配套习题挑战模式3/5

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单选题

难度系数：

3.方程x²-2(3x-2)+(x+1)=0的一般形式是( )

A: x²-5x+5=0

B: x²+5x+5=0

C: x²+5x-5=0

D: x²+5=0

提示1：5LiA5YWD5LqM5qyh5pa556iL55qE5LiA6Iis5byPPGltZyB3aWR0aD0xNjYgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvQUEvckJBQ0psVElta2Z5Mjl4bUFBQURBZm53ekRNMDc5LnBuZyI+
答案：QQ==
6Kej562U77ya4oi1eDxzdXA+Mjwvc3VwPi0yKDN4LTIpKyh4KzEpPTA8YnI+4oi0PGltZyB3aWR0aD0yNCBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8zRS9FOS9yQkFDSjFUSW1ramc0R3kxQUFBQk8zZXg4Ykk1MTgucG5nIj4tNngrNCt4KzE9MDxicj7iiLQgeDxzdXA+Mjwvc3VwPi01eCs1PTA8YnI+5pWF6YCJQQ==

本课配套习题挑战模式4/5

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单选题

难度系数：

4.一元二次方程7x²—2x=0的二次项、一次项、常数项依次是 ( )

A: 7x²，2x，0

B: 7x²，-2x，无常数项

C: 7x²，0，2x

D: 7x²，-2x，0

提示1：5LiA5YWD5LqM5qyh5pa556iL5LqM5qyh6aG544CB5LiA5qyh6aG544CB5bi45pWw6aG55L6d5qyh5pivYTxpbWcgd2lkdGg9MTkgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvRTkvckJBQ0oxVEltcFBCMWprLUFBQUJZUmkybG9NODA1LnBuZyI+LGJ4LGM=
答案：RA==
6Kej562U77yaN3g8c3VwPjI8L3N1cD7igJQyeD0w55qE5LqM5qyh6aG544CB5LiA5qyh6aG544CB5bi45pWw6aG55L6d5qyh5pivN3g8c3VwPjI8L3N1cD7vvIwtMnjvvIwwPGJyPuaVhemAiUQ=

本课配套习题挑战模式5/5

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单选题

难度系数：

5.若x=2是关于x的一元二次方程x²-mx+8=0的一个解，则m的值是( )

A: 6

B: 5

C: 2

D:

提示1：5LiA5YWD5LqM5qyh5pa556iL55qE6Kej55qE5a6a5LmJ77ya5L2/5pa556iL5oiQ56uL55qE5pyq55+l5pWw55qE5YC85bCx5piv5q2k5pa556iL55qE6Kej
答案：QQ==
6Kej562U77ya4oi1eD0y5piv5YWz5LqOeOeahOS4gOWFg+S6jOasoeaWueeoi3g8c3VwPjI8L3N1cD4tbXgrOD0w55qE5LiA5Liq6KejPGJyPuKItOaKing9MuW4puWFpXg8c3VwPjI8L3N1cD4tbXgrOD0w5Lit5b6XPGJyPjxpbWcgd2lkdGg9NzUgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNzMvMUYvckJBQ0UxVEltb3J6eF9QNUFBQUIxcnBUbExNMzkxLnBuZyI+PTA8YnI+4oi0bT02PGJyPuaVhemAiUE=

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本课配套习题挑战模式1/5

本课配套习题挑战模式2/5

本课配套习题挑战模式3/5

本课配套习题挑战模式4/5

本课配套习题挑战模式5/5

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