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(2x+1)^2 - (2x-1) ^2 =

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(2x+1)^2 - (2x-1) ^2 = [#permalink] New post 05 Dec 2017, 13:16
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Question Stats:

80% (00:21) correct 20% (00:46) wrong based on 5 sessions
\((2x+1) ^2 - (2x-1) ^2 =\)

A. 2

B. 8x

C. 4x-1

D. 4x+1

E. 8x+2
[Reveal] Spoiler: OA

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Re: (2x+1)^2 - (2x-1) ^2 = [#permalink] New post 06 Dec 2017, 08:00
Carcass wrote:
\((2x+1) ^2 - (2x-1) ^2 =\)

A. 2

B. 8x

C. 4x-1

D. 4x+1

E. 8x+2

[Reveal] Spoiler: OA
OA in 24h


here,

it can be written as

\((4x^2 + 4x + 1) - (4x^2 - 4x + 1) = 8x\)
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Re: (2x+1)^2 - (2x-1) ^2 =   [#permalink] 06 Dec 2017, 08:00
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