OpenStudy (anonymous):

.

2 years ago
Nnesha (nnesha):

is it x^2-64 or +64 ?

2 years ago
Nnesha (nnesha):

`discriminant ` \[\huge\rm \frac{ -b \pm {\sqrt{\color{Red}{b^2-4ac}} }}{ 2a }\] the red part is discriminant you should use that to find if it's factorable or not

2 years ago
OpenStudy (anonymous):

its the way its written, and yes, i know on the internet its - but no

2 years ago
Nnesha (nnesha):

i'm not asking cuz its on the internet when you have x^2 `minus` y^2 then you can apply `difference of square` method ...

2 years ago
OpenStudy (anonymous):

i gtg if you could leave all of the steps for me to look at thx

2 years ago
Nnesha (nnesha):

\[\huge\rm x^2-y^2=(x+y)(x-y)\] ^difference of squares but in ur question it's positive 64 so you can't apply that

2 years ago
OpenStudy (anonymous):

x^2 + 64=(x+8i) (x-8i)

2 years ago
OpenStudy (anonymous):

x = -8

2 years ago