配套习题- 完全平方公式 -【青果学苑】

1/5单选题

难度：

1.下列式子中，是完全平方的展开式的是 ( )

A	a²+ab+b²
B	a²+2a+2
C	a²-2b+b²
D	a²+2a+1

正确答案：RA==

6Kej562U77ya4oi1YTxzdXA+Mjwvc3VwPisyYSsxPTxpbWcgd2lkdGg9NzcgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvQTcvckJBQ0psVElsZjN6ZTZBVUFBQUNITU9iZjljNTA0LnBuZyI+PGJyPuaVhemAiUQ=

2/5单选题

难度：

2.下列运算正确的是( )

A	a²·a⁴=a⁸
B	(x-2)(x+3)=x²-6
C	(x-2)²=x²-4
D	2a+3a=5a

正确答案：RA==

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

3/5单选题

难度：

3.运用完全平方公式计算89.8²的最佳方法是( )

A	(89+0.8)²
B	(80+9.8)²
C	(90-0.2)²
D	(100-10.2)²

正确答案：Qw==

6Kej562U77ya4oi1PGltZyB3aWR0aD0zMiBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC83My8xQi9yQkFDRTFUSWxneWpFMnJnQUFBQmZoU0Z3SlkzNzYucG5nIj49PGltZyB3aWR0aD02OSBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9BQS8yMy9yQkFDRkZUSWxnM3hjT09yQUFBQjZudVQ5aXM1MDcucG5nIj48YnI+5pWF6YCJQw==

4/5单选题

难度：

4.若x²+2ax+16是一个完全平方的展开式，则a的值为 ( )

A	8
B	4
C	±4
D	±8

正确答案：Qw==

6Kej562U77ya4oi1eDxzdXA+Mjwvc3VwPisyYXgrMTY9PGltZyB3aWR0aD02NyBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8zRS9FNi9yQkFDSjFUSWxnbXpnX1M0QUFBQ0pFNXFOM3M0MjYucG5nIj48YnI+4oi0MmE9PGltZyB3aWR0aD0yNCBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC9BQS8yMy9yQkFDRkZUSWxnbmpGTUh2QUFBQlRTMzBobWczNjQucG5nIj48YnI+4oi0YT08aW1nIHdpZHRoPTI0IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzczLzFCL3JCQUNFMVRJbGduUS1nbXNBQUFCUTEwUWJ5MDA3Ny5wbmciPjxicj7mlYXpgIlD

5/5单选题

难度：

5.若使x²-6x+m成为形如(x-a)²的完全平方式，则m、a的值为( )

A	m=9，a=9
B	m=9，a=3
C	m=3，a=3
D	m=-3，a=-2

正确答案：Qg==

6Kej562U77ya4oi1eDxzdXA+Mjwvc3VwPi02eCs5PTxpbWcgd2lkdGg9NjcgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNzMvMUIvckJBQ0UxVElsZ1dRZkJnckFBQUNBc29BTExzOTI4LnBuZyI+PGJyPuKItG09OSxhPTM8YnI+5pWF6YCJQg==