Does anyone know what x2 is in this problem and what it does?
x2+20=84
What does it mean x2?
\(x^2\) or \(2*x\)
If x2 = \(x^2 \) x^2+20=84 x^2=64 x=sqrt(64) x=8
If x2 = \(2*x\)
2x+20=84
2x=64
x=32
+66 
