JAMB - Mathematics (1998 - No. 23)
If the distance between the points (x, 3) and (-x, 2) is 5. Find x
6.0
2.5
\(\sqrt{6}\)
\(\sqrt{3}\)
توضیح
d2 = (y - y)2 + (x - x)2
5 = 4x2 + 1 = 25= 4x2 + 1
= 4x2 = 25 - 1= 24
x2 = \(\frac{24}{4}\)
x = \(\sqrt{6}\)
5 = 4x2 + 1 = 25= 4x2 + 1
= 4x2 = 25 - 1= 24
x2 = \(\frac{24}{4}\)
x = \(\sqrt{6}\)