Answer:
the possible values of x are:
x = 7 + √21
x = 7 - √21
Explanation:
To find the possible value of x, we need to calculate the distance between points P(x, 3) and Q(7, -1) using the distance formula:
d(PQ) = √((x - 7)² + (3 - (-1))²) = 5
Simplifying the equation:
d(PQ) = √((x - 7)² + 4) = 5
Squaring both sides of the equation:
(x - 7)² + 4 = 25
Expanding the equation:
(x - 7)² = 25 - 4
(x - 7)² = 21
Taking the square root of both sides:
x - 7 = ±√21
Now we can solve for x:
x = 7 ± √21