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If (2x + 1)^2 = 100, then which one of the following COULD e
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18 Apr 2018, 12:02
18 Apr 2018, 12:02
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Question Stats:
74% (00:44) correct
26% (00:58) wrong based on 50 sessions
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If \((2x + 1) ^2 = 100\), then which one of the following COULD equal x ?
(A) \(\frac{-11}{2}\)
(B) \(\frac{-9}{2}\)
(C) \(\frac{11}{2}\)
(D) \(\frac{13}{2}\)
(E) \(\frac{17}{2}\)
(A) \(\frac{-11}{2}\)
(B) \(\frac{-9}{2}\)
(C) \(\frac{11}{2}\)
(D) \(\frac{13}{2}\)
(E) \(\frac{17}{2}\)
If (2x + 1)^2 = 100, then which one of the following COULD e
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Updated on: 17 Nov 2021, 16:33
Updated on: 17 Nov 2021, 16:33
1
Consider (2x + 1) as Y
We are given
Y^2 = 100
Therfore,
Y = + 10 or -10
That is
2x + 1 = 10
2x = 9
x = 9/2
OR
2x + 1 = -10
2x = -11
x = -11/2
Correct Answer: Option A
We are given
Y^2 = 100
Therfore,
Y = + 10 or -10
That is
2x + 1 = 10
2x = 9
x = 9/2
OR
2x + 1 = -10
2x = -11
x = -11/2
Correct Answer: Option A
Re: If (2x + 1)^2 = 100, then which one of the following COULD e
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17 Jul 2018, 12:36
17 Jul 2018, 12:36
1
Carcass wrote:
If \((2x + 1) ^2 = 100\), then which one of the following COULD equal x ?
(A) \(\frac{-11}{2}\)
(B) \(\frac{-9}{2}\)
(C) \(\frac{11}{2}\)
(D) \(\frac{13}{2}\)
(E) \(\frac{17}{2}\)
(A) \(\frac{-11}{2}\)
(B) \(\frac{-9}{2}\)
(C) \(\frac{11}{2}\)
(D) \(\frac{13}{2}\)
(E) \(\frac{17}{2}\)
Given
( 2x +1 )^2 = 100
2x + 1 = 10 or -10
So, x has to 2 different values.
2x +1 = 10
x = 9/2
or
2x + 1 = -10
2x = -11
x = -11/2.
Option A is our answer.
