配套习题- 如何灵活运用平方差公式解题 -【青果学院】

1/5单选题

难度：

1.若a²−b²＝

，a−b＝

，则a+b的值为（　　）

A	−
B
C	1
D	2

正确答案：Qg==

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

2/5单选题

难度：

2.计算（x-y）（-y-x）的结果是（　　）

A	-x²-y²
B	-x²+y²
C	x²+y²
D	x²-y²

正确答案：Qg==

6Kej77ya77yIeC1577yJ77yILXkteO+8iT15PHN1cD4yPC9zdXA+LXg8c3VwPjI8L3N1cD4uIDxicj7mlYXpgIlCLiA=

3/5单选题

难度：

3.下列多项式相乘，不能运用公式“（a+b）（a-b）=a²-b²”计算的是（　　）

A	（2x-y）（2x+y）
B	（-2x-y）（-2x+y）
C	（-2x-y）（2x+y）
D	（-2x+y）（2x+y）

正确答案：Qw==

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

4/5单选题

难度：

4.计算2009²-2008×2010+（-1）²⁰⁰⁹的结果是（　　）

A	0
B	1
C	-1
D	3

正确答案：QQ==

6Kej77yaMjAwOTxzdXA+Mjwvc3VwPi0yMDA4w5cyMDEwK++8iC0x77yJPHN1cD4yMDA5PC9zdXA+PGJyPj0yMDA5PHN1cD4yPC9zdXA+Le+8iDIwMDktMe+8icOX77yIMjAwOSsx77yJK++8iC0x77yJPGJyPj0yMDA5PHN1cD4yPC9zdXA+LTIwMDk8c3VwPjI8L3N1cD4rMSvvvIgtMe+8iTxicj49MC4gPGJyPuaVhemAiUEuIA==

5/5单选题

难度：

5.化简（3+1）（3²+1）（3⁴+1）（3⁸+1）得（　　）

A	（3⁸+1）²
B	（3⁸-1）²
C	3¹⁶-1
D	(3¹⁶−1)

正确答案：RA==

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