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A number x is multiplied with itself and then added to the product of

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GMAT Date: 02-18-2019
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A number x is multiplied with itself and then added to the product of  [#permalink]

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New post 14 Apr 2019, 07:16
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A
B
C
D
E

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  5% (low)

Question Stats:

92% (01:08) correct 8% (01:29) wrong based on 25 sessions

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A number x is multiplied with itself and then added to the product of 4 and x. If the result of these two operations is -4, what is the value of x?

A. -4
B. -2
C. 2
D. 4
E. Cannot be determined.
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Re: A number x is multiplied with itself and then added to the product of  [#permalink]

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New post 14 Apr 2019, 21:20
mangamma wrote:
A number x is multiplied with itself and then added to the product of 4 and x. If the result of these two operations is -4, what is the value of x?

A. -4
B. -2
C. 2
D. 4
E. Cannot be determined.


As we do not have subtraction and the result is still negative, X has to be negative..
So Ans will be A, B or E..
-4*-4=16... 16+(-4)*4=0..
-2*-2=4.... 4+(-2)*4=4-8=-4....answer B

Otherwise..
The equation can be formed as \(x*x+4*x=-4....x^2+4x+4=0....(x+2)^2=0\). Thus x=-2

B
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Re: A number x is multiplied with itself and then added to the product of   [#permalink] 14 Apr 2019, 21:20
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A number x is multiplied with itself and then added to the product of

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