Question

need help finishiing a problem
x^2-10x+25=0

a=1 b=-10 c=25

10+-(square root)100-100/2

Answer 1

\[(x-5)^2\]
\[x=5\]

Answer 2

a=1 b=-10 c=25 is correct
(x-5)^2 = 0
x = 5

Answer 3

Where'd you get stuck Brittany?

Answer 4

10±{-10^2-4(1)(25)}/2 {} stands for square root cos idont have a square root symbol

Answer 5

then i simplified and got 10±/2

Answer 6

That's
\[\frac{10 \pm 0}{2} = \frac{10}{2} = 5\]

Answer 7

and its only one answer? usually its like x = # or #

Answer 8

Right, but in this case it's not because the part in the square root became a 0. Only if the square root part is non-zero do you get two solutions (one for the plus and one for the minus)

Answer 9

thankyou :)

Answer 10

polpak can you help me with http://openstudy.com/groups/mathematics#/groups/mathematics/updates/4e4970570b8b8d00ebe389b9