配套习题- 如何构造完全平方公式解题 -【青果学院】

1/5单选题

难度：

1.下列二次三项式是完全平方式的是（　　）

A	x²-8x-16
B	x²+8x+16
C	x²-4x-16
D	x²+4x+16

正确答案：Qg==

6Kej77yaQeOAgeW6lOS4ung8c3VwPjI8L3N1cD4tOHgrMTbvvIzmlYVB6ZSZ6K+v77ybPGJyPkLjgIF4PHN1cD4yPC9zdXA+Kzh4KzE277yM5q2j56Gu77ybPGJyPkPjgIHlupTkuLp4PHN1cD4yPC9zdXA+LTR4KzTvvIzmlYVD6ZSZ6K+v77ybPGJyPkTjgIHlupTkuLp4PHN1cD4yPC9zdXA+KzR4KzTvvIzmlYVE6ZSZ6K+vLiA8YnI+5pWF6YCJQi4g

2/5单选题

难度：

2.已知x²+16x+k是完全平方式，则常数k等于（　　）

A	64
B	48
C	32
D	16

正确答案：QQ==

6Kej77ya4oi1MTZ4PTLDl3jDlzjvvIw8YnI+4oi06L+Z5Lik5Liq5pWw5piveOOAgTg8YnI+4oi0az04PHN1cD4yPC9zdXA+PTY0LiA8YnI+5pWF6YCJQS4g

3/5单选题

难度：

3.多项式4x²+1加上一个单项式后，使它能成为一个二项整式的完全平方，则满足条件的单项式有（　　）

A	1个
B	2个
C	3个
D	4个

正确答案：Qw==

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

4/5单选题

难度：

4.若a²+2b²+2ab−b+

＝0，则a，b的值分别为（　　）

A	，
B	，
C	，
D	，

正确答案：QQ==

6Kej77ya5Y6f5byP5Y+v5YyW5Li677ya77yIYSti77yJPHN1cD4yPC9zdXA+K++8iGItPGltZyB3aWR0aD02IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzNDLzA1L3JCQUNFMU5zTUVxeDZYSktBQUFCSEdqTWpGMDg3OC5wbmciPu+8iTxzdXA+Mjwvc3VwPj0w77yMPGJyPuaVheWPr+W+l++8mmE9LWLvvIxiPTxpbWcgd2lkdGg9NiBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8zQy8wNS9yQkFDRTFOc01FcXg2WEpLQUFBQkhHak1qRjA4NzgucG5nIj4uIDxicj7mlYXpgIlBLiA=

5/5单选题

难度：

5.若a，b，c为△ABC的三边，且关于x的二次三项式x²+2（a+b+c）x+3（ab+bc+ca）为完全平方式，则△ABC是（　　）

A	直角三角形
B	等边三角形
C	等腰直角三角形
D	只有两边相等的等腰三角形

正确答案：Qg==

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