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

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Manager
Joined: 25 Dec 2018
Posts: 226
Location: India
Concentration: General Management, Finance
GMAT 1: 590 Q48 V23
GPA: 3.4
WE: Engineering (Consulting)
A number x is multiplied with itself and then added to the product of  [#permalink]

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14 Apr 2019, 07:16
00:00

Difficulty:

15% (low)

Question Stats:

100% (01:13) correct 0% (00:00) wrong based on 13 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.
Math Expert
Joined: 02 Aug 2009
Posts: 7567
Re: A number x is multiplied with itself and then added to the product of  [#permalink]

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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..

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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