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(x-1)(x+1)=0
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09 Jul 2020, 08:10
09 Jul 2020, 08:10
Expert Reply
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Question Stats:
94% (00:10) correct
5% (00:24) wrong based on 36 sessions
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\((x-1)(x+1)=0\)
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Quantity A |
Quantity B |
x |
0 |
A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
Re: (x-1)(x+1)=0
[#permalink]
10 Jul 2020, 02:28
10 Jul 2020, 02:28
(x-1)(x+1)=0
x^2 +x -x-1=0
x^2=1
or x = +1 and -1
so we cant have multiple answers, option D
x^2 +x -x-1=0
x^2=1
or x = +1 and -1
so we cant have multiple answers, option D
Re: (x-1)(x+1)=0
[#permalink]
12 Jul 2020, 06:09
12 Jul 2020, 06:09
(x+1)(x - 1) = x^2 - 1
x^2 - 1 = 0
X^2 = 1
thus x is either +1 or -1. So x is either more than or less than 0.
Thus answer is D
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x^2 - 1 = 0
X^2 = 1
thus x is either +1 or -1. So x is either more than or less than 0.
Thus answer is D
Kudos if you like this post!
