for two perpendicular lines with slopes m1, m2 , we have m1.m2 = -1.

now consider the x and y axes , their slopes are 0 and infinity , substituting :

0 times infinity = -1,

-1/0 = infinity.

but we know that -1/o = - infinity ,

so far , as 1 ≠ -1.

therefore ;

either zero = - zero ( which is always correct ).

or

infinity = - infinity

am I correct ....!

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TopNewestYa it is impossible to do arithmetic on infinity

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No, you're not correct. You can't do arithmetic on infinity.

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