# Math Help - A second degree equation

1. ## A second degree equation [SOLVED]

I tried to solve the following equation but I got -6 under the radical sign...

Here´s the equation I tried to solve:

(y-4)^2 = 64

Any help perhaps?

2. Originally Posted by Bluerabbits
I tried to solve the following equation but I got -6 under the radical sign...

Here´s the equation I tried to solve:

(y-4)^2 = 64

Any help perhaps?
Take the square root of both sides:
y - 4 = +/- sqrt(64)

y - 4 = +/-8

-Dan

3. Or...
$y^2$ - 8y + 16 = 64 $\Rightarrow$ $y^2$ - 8y - 48 = 0
$\Delta$=256, $y_1$ and $y_2$ = ...

4. Originally Posted by topsquark
Take the square root of both sides:
y - 4 = +/- sqrt(64)

y - 4 = +/-8

-Dan

Thank you!