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# (x+1/2)^2 - (2x-4)^2 =?

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Senior RC Moderator
Status: GMAT Club Team Member
Affiliations: GMAT Club
Joined: 02 Nov 2016
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08 Jul 2019, 04:26
00:00

Difficulty:

25% (medium)

Question Stats:

85% (01:44) correct 15% (01:48) wrong based on 33 sessions

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$$(x+\frac{1}{2})^2 - (2x-4)^2 =$$

(A) $$−3x^2 − 15x + \frac{65}{4}$$

(B) $$3x^2 + 16x$$

(C) $$−3x^2 + 17x − \frac{63}{4}$$

(D) $$5x^2 + \frac{65}{4}$$

(E) $$3x^2$$

Source: Nova GMAT

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Re: (x+1/2)^2 - (2x-4)^2 =?  [#permalink]

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08 Jul 2019, 04:33
If we expand the equations we will have
X^2 +1/4+ X- 4X^2 -16 +16X
--》-3X^2 +17X - 63/4
Option(c)

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Re: (x+1/2)^2 - (2x-4)^2 =?   [#permalink] 08 Jul 2019, 04:33
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