Question 1002938
So for you in an easy way, there are 4 formulas to remember:
(+)x(+)=(+); plus times plus is equal to plus
(+)x(-)=(-); plus times minus is equal to minus
(-)x(+)=(-); minus times plus is equal to minus
(-)x(-)=(+); minus times minus is equal to plus

so for example: 

2 to the power of 2 is 4 
Explanation: 

(2)x(2)= 4

so -2 to the power of 2 is also 4 because 

Explanation:

(-2)x(-2)=4
before the both two's there is a minus sign. so minus times minus is plus. 
That is the reason the answer is positive.