27 -3^2 = ?

Investigate how to evaluate expressions like -3^2, -x^2.
0:00 - Title page(-3)^2
0:10 - -3^2 = ?
0:38 - How to read -3^2
0:53 - (-3)^2
1:04 - How to read
1:13 - Fractions!
1:45 - Evaluate -x^2 using Table Ask mode
2:15 - Is -x^2 always negative?