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# What is the value of d?

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Manager
Joined: 07 Jun 2018
Posts: 52
Location: United States
What is the value of d?  [#permalink]

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23 Dec 2018, 22:48
00:00

Difficulty:

55% (hard)

Question Stats:

44% (01:27) correct 56% (01:34) wrong based on 16 sessions

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What is the value of d?
1. n^2+an+b=(n+c)(n+d)
2. a-c=10
Manager
Joined: 09 Jul 2018
Posts: 64
Re: What is the value of d?  [#permalink]

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23 Dec 2018, 23:03
Ans is C

n^2+an+b=(n+c)(n+d)
n^2+an+b=n^2+(c+d)n+cd
this implies a=c+d
a-c=d
Statement 2 gives a-c =10
so d =10
Re: What is the value of d?   [#permalink] 23 Dec 2018, 23:03
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