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If ab≠0 and points (-a, b) and (-b, a) are in the same quadr

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Re: If ab≠0 and points (-a, b) and (-b, a) are in the same quadr  [#permalink]

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New post 25 Nov 2019, 23:39
gurudabl wrote:
Hi mikemcgarry,

One thing regarding this question has been bugging my mind, could you please help me with it?

For some reason, I cannot get the notion out of my head that the quadrants always have to be in the following formats:
Quadrant I : (x, y)
Quadrant II: (-x, y)
Quadrant III: (-x, -y)
Quadrant IV: (x, -y)

However, if we take the signs of both "a" and "b" to be negative then couldn't it look different?
Lets say: a = -2 and b = -3 then we know that these point falls on the 3rd quadrant but while putting the values in (-a, b) and (-b, a) they would come to be as (2, -3) and (3, -2) which are the standard form of the 4th quadrant (x, -y) isn't it?
Now I know while plotting the values they would fall on the 3rd quadrant but its the confidence that I am lacking when tackling a similar question.

Thank You,
Dablu


The format you mention is perfectly correct assuming x and y are both positive. Keep that in mind and you will not get confused.
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Re: If ab≠0 and points (-a, b) and (-b, a) are in the same quadr   [#permalink] 25 Nov 2019, 23:39

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