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Sum of roots of the equation x2 – 4x – 5 = 0 or 2

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Asif789
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Sum of roots of the equation x2 – 4x – 5 = 0 or 2 [#permalink] New post   10 Feb 2022, 12:21
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Quantity A
Quantity B
\(\)Sum of roots of the equation \(x^2 – 4x – 5 = 0 \)
\(2\)


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
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A
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GreenlightTestPrep
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Re: Sum of roots of the equation x2 – 4x – 5 = 0 or 2 [#permalink] New post   10 Feb 2022, 12:32
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Asif789 wrote:
Quantity A
Quantity B
\(\)Sum of roots of the equation \(x^2 – 4x – 5 = 0 \)
\(2\)


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


Take: \(x^2 – 4x – 5 = 0 \)
Factor: \((x–5)(x+1)= 0 \)
So, either \(x = 5\) or \(x = -1\), which means the sum of the roots \(= 5 + (-1) = 4\)

We have:
QUANTITY A: 4
QUANTITY B: 2

Answer: A
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phoenixrise
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Re: Sum of roots of the equation x2 – 4x – 5 = 0 or 2 [#permalink] New post   11 Feb 2022, 02:05
GreenlightTestPrep wrote:
Asif789 wrote:
Quantity A
Quantity B
\(\)Sum of roots of the equation \(x^2 – 4x – 5 = 0 \)
\(2\)


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


Take: \(x^2 – 4x – 5 = 0 \)
Factor: \((x–5)(x+1)= 0 \)
So, either \(x = 5\) or \(x = -1\), which means the sum of the roots \(= 5 + (-1) = 4\)

We have:
QUANTITY A: 4
QUANTITY B: 2

Answer: A


Hi Asif789, refer to this - Good explanation.

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gmatclubot
Re: Sum of roots of the equation x2 – 4x – 5 = 0 or 2 [#permalink]
11 Feb 2022, 02:05
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