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f(x)=x^2+2x-2

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Carcass
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f(x)=x^2+2x-2 [#permalink] New post   20 Jul 2020, 11:29
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\(f(x)=x^2+2x-2\)


Quantity A
Quantity B
The value of x when \(f(x)=13\)
3



A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.

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D
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Re: f(x)=x^2+2x-2 [#permalink] New post   23 Jul 2020, 07:09
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Carcass wrote:
\(f(x)=x^2+2x-2\)


Quantity A
Quantity B
The value of x when \(f(x)=13\)
3




If \(f(x) = 13\), then we can write: \(x^2+2x-2 = 13\)
To solve this equation, let's first subtract \(13\) from both sides of the equation to get: \(x^2+2x-15 = 0\)
Factor to get: \((x-3)(x+5) = 0\)
When we solve we get EITHER \(x = 3\) OR \(x = -5\)

If \(x = 3\), then the two quantities are equal
If \(x = -5\), then Quantity B is greater

Answer: D

Cheers,
Brent
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Re: f(x)=x^2+2x-2 [#permalink]
23 Jul 2020, 07:09
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