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If b and c are negative integers, then which of the following must als

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If b and c are negative integers, then which of the following must als  [#permalink]

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New post 19 Feb 2019, 01:01
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

56% (01:22) correct 44% (01:04) wrong based on 48 sessions

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Re: If b and c are negative integers, then which of the following must als  [#permalink]

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New post 19 Feb 2019, 01:12
D is the answer. b and c is both negative and thereby b/c and c/b are both positive

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If b and c are negative integers, then which of the following must als  [#permalink]

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New post Updated on: 19 Feb 2019, 04:50
Bunuel wrote:
If b and c are negative integers, then which of the following must also be negative?


A. \(b^3 – c^3\)

B. \(bc^2 – c\)

C. \(bc(b – c)\)

D. \(\frac{b}{c} + \frac{c}{b}\)

E. \(b^2c + bc^2\)



E is the correct answer.

\(b^2\) = positive

c = negative

\(b^2 c\) = negative

again ,

\(c^2\)= positive

b=negative

\(c^2b\)= negative

\(b^2c + c^2b\) = negative + negative = negative.

Originally posted by KSBGC on 19 Feb 2019, 02:34.
Last edited by KSBGC on 19 Feb 2019, 04:50, edited 2 times in total.
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Re: If b and c are negative integers, then which of the following must als  [#permalink]

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New post 19 Feb 2019, 04:38
Bunuel wrote:
If b and c are negative integers, then which of the following must also be negative?


A. \(b^3 – c^3\)

B. \(bc^2 – c\)

C. \(bc(b – c)\)

D. \(\frac{b}{c} + \frac{c}{b}\)

E. \(b^2c + bc^2\)




\(b^2c + bc^2\)
will always be -ve
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Re: If b and c are negative integers, then which of the following must als   [#permalink] 19 Feb 2019, 04:38
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