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# If 2x^2 + 4x - 5 = x^2 + 2x + x^2 + 5, then x^2 =

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Senior PS Moderator
Joined: 26 Feb 2016
Posts: 3343
Location: India
GPA: 3.12
If 2x^2 + 4x - 5 = x^2 + 2x + x^2 + 5, then x^2 =  [#permalink]

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11 Oct 2018, 03:21
1
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Difficulty:

15% (low)

Question Stats:

89% (01:06) correct 11% (00:38) wrong based on 31 sessions

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If $$2x^2 + 4x - 5 = x^2 + 2x + x^2 + 5$$, then $$x^2 =$$

A. 0
B. 4
C. 10
D. 25
E. 100

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Joined: 05 May 2017
Posts: 5
Re: If 2x^2 + 4x - 5 = x^2 + 2x + x^2 + 5, then x^2 =  [#permalink]

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11 Oct 2018, 04:17
Answer is D. Solving simple equation after cancelling x^2
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Re: If 2x^2 + 4x - 5 = x^2 + 2x + x^2 + 5, then x^2 =  [#permalink]

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11 Oct 2018, 06:34
pushpitkc wrote:
If $$2x^2 + 4x - 5 = x^2 + 2x + x^2 + 5$$, then $$x^2 =$$

A. 0
B. 4
C. 10
D. 25
E. 100

$$2x^2 + 4x - 5 = x^2 + 2x + x^2 + 5$$

Or, $$2x^2 + 4x - 5 = 2x^2 + 2x + 5$$

Or, $$2x = 10$$

So, $$x = 5$$ ; Thus, $$x^2 = 25$$ Answer must be (D)
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Re: If 2x^2 + 4x - 5 = x^2 + 2x + x^2 + 5, then x^2 =   [#permalink] 11 Oct 2018, 06:34
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# If 2x^2 + 4x - 5 = x^2 + 2x + x^2 + 5, then x^2 =

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