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Find the value

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anuishp
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Find the value [#permalink] New post   14 Aug 2018, 21:23
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Question Stats:

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Find the value of x = (-5^2 - 5) + (2*3*(-5))

a) -10
b) 60
c) 50
d) -60
e) 10

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Re: Find the value [#permalink] New post   14 Aug 2018, 21:46
anuishp wrote:
Find the value of x = (-5^2 - 5) + (2*3*(-5))

a) -10
b) 60
c) 50
d) -60
e) 10



x=[(-5)^2 -5] +(2*3*-5)
= (25-5)+(6*-5)
=20-30
=-10

Ans A.
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Re: Find the value [#permalink] New post   14 Aug 2018, 21:50
anuishp wrote:
Find the value of x = (-5^2 - 5) + (2*3*(-5))

a) -10
b) 60
c) 50
d) -60
e) 10


anuishp pls update OA and source of the question, if possible.
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anuishp
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Re: Find the value [#permalink] New post   14 Aug 2018, 21:57
Princ wrote:
anuishp wrote:
Find the value of x = (-5^2 - 5) + (2*3*(-5))

a) -10
b) 60
c) 50
d) -60
e) 10



This question is made up. It is very similar to a problem I saw on the official GMAT, with the main kicker being the -5^2 ... I don't have the OA and I was stumped by this question on the test
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Re: Find the value [#permalink] New post   14 Aug 2018, 22:06
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x = (-5^2-5) +(2*3(-5))
= (-25-5) +(-30)
= -30-30
= -60
Answer D

Trap (-5)^2 = (-5)*(-5) = 25, but -5^2 = -(5*5)= -25

anuishp wrote:
Find the value of x = (-5^2 - 5) + (2*3*(-5))

a) -10
b) 60
c) 50
d) -60
e) 10
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Re: Find the value [#permalink] New post   14 Aug 2018, 22:39
anuishp wrote:
Find the value of \(x = (-5^2 - 5) + (2*3*(-5)\)

a) -10
b) 60
c) 50
d) -60
e) 10


\(x = (-5^2 - 5) + (2*3*(-5))\)

Or, \(x = (a^2 + a) + (2*3*(a))\) If u take a = -5 Here it is -(a)^2+a + 2*3*a

Or, \(x = (a^2 + a+ 6a)\)

Or, \(x = (a^2 +7a)\)

Or, \(x = a(a + 7)\)

Or, \(x = -5(-5 + 7)\)

Or, \(x = -10\), Answer must be (A)

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Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Problem Solving (PS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
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Re: Find the value [#permalink]
14 Aug 2018, 22:39
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