I keep getting the wrong answer...?

Question

So the two points are (a,b) and (-2a,0) and when I plug that into the distance formula, I keep getting the wrong answer...what do you get?

thank you i figured out my mistake...a stupid mistake at that...

Answer 1

Hm...what's the wrong answer you're getting?

I get sqrt(9a^2 + b^2).

But if you turned that in on your homework, your teacher would say, "how did you get that answer?"

Answer 2

d^2 = (a - (-2a))^2 + (b - 0)^2 = (3a)^2 + b^2 = 9a^2 + b^2

d = sqrt(9a^2 + b^2)

Answer 3

Distance=sqrt[{(a)-(-2a)}^2 + {(b)-(0)}^2]
= sqrt[{a+2a}^2 + {b-0}^2]
= sqrt[{3a}^2 +{b}^2]
= sqrt[{3a}^2 + {b}^2]
= sqrt[9a^2 + b^2]

Answer 4

d=[(-2a-a)^2+(0-b)^2]^1/2
=sq.rt of 9a^2+b^2