A line is of length 10 units and one of its ends is (-2,3). If the ordinate of the order end is 9, prove that the abscissa of the other end is 6 or -10.
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Solution
The length of line is 10cm
let the abscissa be x
So the points are (−2,3);(x,9)
Distance formula is √(x+2)2+(9−3)2=10x2+4x+4+36=100x2+4x−60=0x2+10x−6x−60=0x(x+10)−6(x+10)(x+10)(x−6)x=6,−10