How many units apart are the points (4, -3) and (-4, 3)?

Question

anonymous · Answer

to find the distance (or units) apart between two points $$(x_1,y_1) and (x_2,y_2)$$
$$D=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$$

anonymous · Answer

D is the Distance apart between the two points...

anonymous · Answer

what do you get if you use the formula??

anonymous · Answer

um.. so far 0+-8. Am I wrong?

anonymous · Answer

yes...

anonymous · Answer

T-T I suck at this...

anonymous · Answer

i think the mistake is from.....
x(2)-x(1)
so it is supposed to be (4-(-4))^2

anonymous · Answer

Oh I think I understand...

anonymous · Answer

-16?

anonymous · Answer

no..its supposed to be 64 for (4-(-4))^2

anonymous · Answer

do you understand why??

anonymous · Answer

4-(-4)=4+4=8
and therefore 8^2=64

anonymous · Answer

oh. Thank you very much lol  I feel dumb

anonymous · Answer

so what do you get when you find the distance??

anonymous · Answer

Let d be the distance between the points.Then
$$d=\sqrt{\left( -4-4 \right)^{2}+\left( 3+3 \right)^{2}}$$
$$d=\sqrt{64+36}=\sqrt{100}=10$$