Explanation: x^2+0x+(-x^2)=0 Anything multiplied by 0 is equal to 0 x^2+0+(-x^2)=0 x^2+(-x^2)=0 A positive and a negative makes a negative x^2-x^2=0 0=0
For these types of problems, play around with multiplying by 0 and adding negatives.
I hope this helps! Please comment if you have any questions.
