Solve:(2+x)(2−x)=0 (2+x)(2-x)=0 (2+x)(2−x)=0
We use the abbreviated multiplication formula:
4−x2=0 4-x^2=0 4−x2=0
We isolate the terms and extract the root:
4=x2 4=x^2 4=x2
x=4 x=\sqrt{4} x=4
x=±2 x=\pm2 x=±2
±2