If (x,y) be on the line joining the 2 points (1,-3)(-4,2)p.t x+y+2=0
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Given points
(1,-3)(-4,2)
And the mid point = (x,y)
Now by mid point formula
X= x1+x2/2
= 1-4/2
=-3/2
Y=y1+y2/2
=-3+2/2
=-1/2
Now x+y
= -3/2-1/2
=-4/2
= -2
Now x+y+2
= -2+2
=0 proved
(1,-3)(-4,2)
And the mid point = (x,y)
Now by mid point formula
X= x1+x2/2
= 1-4/2
=-3/2
Y=y1+y2/2
=-3+2/2
=-1/2
Now x+y
= -3/2-1/2
=-4/2
= -2
Now x+y+2
= -2+2
=0 proved
Krish85131:
Thanks
But it is not mentioned that x,y is mid pt
When the statement defines that points joining two points then it means that it is their mid point....
Oh ok thanks for your kind answer
My plsr...
Wlcm
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