Question

DISTANCE BETWEEN A(-3,-4) AND B(a,-5) IS 9UNITS,VALUE OF a IS----------

2 points

1

-1

3

-3​

Answer 1

Step-by-step explanation:

we have to find value of a .

given, point A (-3, -14) and B (a, -5)

and distance between A and B = 9 unit

so, use distance formula ,

\sqrt{(-3-a)^2+(-14+5)^2}=9(−3−a)2+(−14+5)2=9

or, √{(-3 - a)² + (-9)²}= 9

squaring both sides,

or, (-3 - a)² + (-9)² = 9²

or, (-3 - a)² + 81 = 81

or, (-3 - a)² = 0

hence, a = -3