4. If the distance between the points (x,-1) and (3, 2) is 5, then the value of x is La) -7 or -1 (b)-7 or 1 (c) 7 or 1 (d) 7 or -1 1 ni om the
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Explanation:
Correct option is d
A X= 7
B X=-1
Distance between wo points (x₁, y₁) and
(x2, y2) can be calculated using the
formula √(x₂-x₁)² + (y2 − ₁)² Distance between the points (x,-1) and (3, 2) = 5
=> √√√(x − 3)² + (−1−2)² = 5
(x-3)² +9=5
(x-3)² + 9 = 25
(x - 3)² = 16
x 3 +4 or -4
x = 7 or x = -1
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