X squared = −169. A= undefined B= 13 C= ±13 D= −13

A.   Undefined.

Step-by-step explanation:

There is no real square root of a negative number.

i think it's ф or x=6,-6

step-by-step explanation:

-x^2=-36

x^2=-36

ф

or

if you mean by : -(x^2)=-36

it'll be: x^2=36

x=6,x=-6

hope it'll ! have a good day!

you for asking!