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Which of the following equations is not equivalent to 36y^2
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17 Oct 2017, 22:30
17 Oct 2017, 22:30
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Question Stats:
99% (00:23) correct
0% (00:00) wrong based on 7 sessions
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Which of the following equations is not equivalent to \(36y^2 + 9 = x^2\)?
(A) \(36y^2 = x^2 - 9\)
(B) \(36y^2 = (x - 3)(x + 3)\)
(C) \(108y^2 + 27 = 3x^2\)
(D) \(y^2 = \frac{x^2 - 9}{36}\)
(E) \(6y = x - 3\)
Kudos for correct solution.
(A) \(36y^2 = x^2 - 9\)
(B) \(36y^2 = (x - 3)(x + 3)\)
(C) \(108y^2 + 27 = 3x^2\)
(D) \(y^2 = \frac{x^2 - 9}{36}\)
(E) \(6y = x - 3\)
Kudos for correct solution.
Re: Which of the following equations is not equivalent to 36y^2
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18 Oct 2017, 05:38
18 Oct 2017, 05:38
Let's analyze choice by choice
(A) \(36y^2 = x^2 - 9\) --> this is the same after adding -9 to both sides
(B) \(36y^2 = (x - 3)(x + 3)\) --> this is the same after rewriting x^2-9 = (x-3)(x+3)
(C) \(108y^2 + 27 = 3x^2\) --> this is the same after multiplying both sides by 3
(D) \(y^2 = \frac{x^2 - 9}{36}\) -> this is the same after adding -9 to both sides and dividing both sides by 36
(E) \(6y = x - 3\)
Thus, we are left with E, which is our answer!
(A) \(36y^2 = x^2 - 9\) --> this is the same after adding -9 to both sides
(B) \(36y^2 = (x - 3)(x + 3)\) --> this is the same after rewriting x^2-9 = (x-3)(x+3)
(C) \(108y^2 + 27 = 3x^2\) --> this is the same after multiplying both sides by 3
(D) \(y^2 = \frac{x^2 - 9}{36}\) -> this is the same after adding -9 to both sides and dividing both sides by 36
(E) \(6y = x - 3\)
Thus, we are left with E, which is our answer!
gmatclubot
Re: Which of the following equations is not equivalent to 36y^2 [#permalink]
18 Oct 2017, 05:38
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