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x^2 + 4x = 32
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25 Jul 2022, 00:52
25 Jul 2022, 00:52
Expert Reply
00:00
Question Stats:
49% (00:41) correct
49% (00:41) wrong based on 14 sessions
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\(𝑥^2 + 4𝑥 = 32
\)
A. Quantity A is greater
B. Quantity B is greater
C. The two quantities are equal
D. The relationship cannot be determined from the information given
\)
Quantity A |
Quantity B |
4 |
8+sum of all possible values of x |
A. Quantity A is greater
B. Quantity B is greater
C. The two quantities are equal
D. The relationship cannot be determined from the information given
Part of the project: GRE QCQ & PS 3 Questions Every One DAILY Challenge - (2022)
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GRE Math Essentials (2022)
GRE Geometry Formulas for a Q170
GRE - Math Book
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GRE Math Essentials (2022)
GRE Geometry Formulas for a Q170
GRE - Math Book
Re: x^2 + 4x = 32
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27 Jul 2022, 15:34
27 Jul 2022, 15:34
Expert Reply
OE
Quote:
Just looking at it, it looks like whatever B is, it’s going to be larger than A. However, this is a quadratic equation equivalent to 𝑥2 +4𝑥 − 32 = 0. Factor into (x + 8)(x – 4) = 0. In order for this equation to equal 0, either x+ 8 = 0 or x – 4 = 0. So, x must equal to either -8 or 4, the sum of which is -4. -4 added to 8 gives 4.
gmatclubot
Re: x^2 + 4x = 32 [#permalink]
27 Jul 2022, 15:34
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