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If (x-5)(x+2)=0 , which of the following could be the value
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18 Aug 2020, 10:17
18 Aug 2020, 10:17
Expert Reply
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Question Stats:
69% (00:49) correct
30% (00:47) wrong based on 23 sessions
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If \((x-5)(x+2)=0\) , which of the following could be the value of \(10x^{-3}\) ?
Indicate all such values
A. -5/4
B. -2/25
C. 0
D. 2/25
E. 5/4
Indicate all such values
A. -5/4
B. -2/25
C. 0
D. 2/25
E. 5/4
Re: If (x-5)(x+2)=0 , which of the following could be the value
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18 Aug 2020, 10:18
18 Aug 2020, 10:18
Expert Reply
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Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
Re: If (x-5)(x+2)=0 , which of the following could be the value
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18 Aug 2020, 11:57
18 Aug 2020, 11:57
(x-5)(x+2)=0 gives two possible values for x. x=5 or x=-2.
Then 10x^-3= 10/5^3 = 2/25 if x=5
And 10/(-2)^3 = -5/4 if x=2
So A and D are the answers.
Then 10x^-3= 10/5^3 = 2/25 if x=5
And 10/(-2)^3 = -5/4 if x=2
So A and D are the answers.
