Question

heh please help me out, new here...

Find the value of the unknown if:
R(1, -1) is 5 units from S(-2, b)

Answer 1

Answer:

If the distance between these two. Points is 5 units then using the distance formula

$(1 + 2) {}^{2} + ( - 1 - b) { }^{2} = 5 {}^{2}$

We get the quadratic equation

$b {}^{2} + 2b - 15 = 0$

Which have two solution as b= - 5

Or b=3

So the required answer is b= - 5,3