If the midpoint of the line segment joining the points a(3, 4) and (m,7) is x,y and 2x+2y+1=0.Find the value of m
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Midpoint of (3,4) and (m,7) is M= ( (3+m)/2, (4+7)/2 ) =( (3+m)/2, 11/2)
M satisfies the line equation 2x+2y+1=0
implies 2[(3+m)/2] + 2(11/2) + 1 = 0
3 + m + 11 + 1 = 0
value of m is -15
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