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ALGEBRA
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1) Which is expanded form of a
3
- b
3
?
(a+b) (a<sup>2</sup> - b<sup>2</sup>- ab)
(a-b) (a<sup>2</sup> + b<sup>2</sup> + ab)
(a-b) (a<sup>2</sup> - b<sup>2</sup> - ab)
(a-b) (a<sup>2</sup> - b<sup>2</sup>+ ab)
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Correct Answer: (a-b) (a<sup>2</sup> + b<sup>2</sup> + ab)
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1) Which is expanded form of a<sup>3</sup>- b<sup>3</sup>?
(a+b) (a<sup>2</sup> - b<sup>2</sup>- ab)
(a-b) (a<sup>2</sup> + b<sup>2</sup> + ab)
(a-b) (a<sup>2</sup> - b<sup>2</sup> - ab)
(a-b) (a<sup>2</sup> - b<sup>2</sup>+ ab)
2) What is the value of (6
3
) / ((-3)
3
) ?
8
(-8)
27
(-27)
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Correct Answer: (-8)
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2) What is the value of (6<sup>3</sup>) / ((-3)<sup>3</sup>) ?
8
(-8)
27
(-27)
3) What is the value of x
2
-y
2
if (x+y) = 9, (x - y) = 4?
13
65
36
46
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Correct Answer: 36
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3) What is the value of x<sup>2</sup>-y<sup>2</sup> if (x+y) = 9, (x - y) = 4?
13
65
36
46
4) What is the value of 'X' if x - y = 6 and x + y = 8?
5
6
7
14
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Correct Answer: 7
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4) What is the value of 'X' if x - y = 6 and x + y = 8?
5
6
7
14
5) What is the value of a
2
+b
2
if a+b=9 and ab = 20?
121
(-121)
41
(-41)
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Correct Answer: 41
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5) What is the value of a<sup>2</sup>+b<sup>2</sup> if a+b=9 and ab = 20?
121
(-121)
41
(-41)
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