Simplify the expression 8^2 +9(12÷3*2) - 7 explain each of your steps.

8^2+9(12/3*2)-7

 do parenthesis first ( from left to right)

8^2 +9(8)-7

 do the ^2 and the multiplication next

64 +72 -7

do addition then subtraction

136-7 = 129

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!