Identify the property demonstrated.
3 +4 = 4 +3
done

communicative property  of addition

Step-by-step explanation:

communicative property  of addition:  The order in which numbers are added doesn't change the sum of the numbers .

For any number a & b,

a + b = b + a

similarly,

3 +4 = 4 +3

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!