Question

Find the value of B if the distance between the point A and B is root 8 (1,2) and (3,b)​

Answer 1

b = -4 and 0

Explanation:

Using the distance formula

D = √(x2-x1)² + (y2-y1)²

√8 = √(b-2)² + (3-1)²

√8 = √(b-2)² + 2²

Square both sides

8 = (b-2)² + 2²

8 = (b-2)² + 4

8 - 4 = (b-2)²

4 = (b-2)²

Square root both sides

±√4 = b- 2

±2 = b - 2

b = -2 - 2 and b = -2 + 2

b = -4 and 0

This gives the values of b