Practice problem
If a2=ba^2 = ba2=b, where bbb is positive, what can we say for sure about aaa?
a=ba = \sqrt{b}a=b
a=ba = \sqrt{b}a=b or a=−ba = -\sqrt{b}a=−b
a=b2a=b^2a=b2
a=b−2a=b^{-2}a=b−2 or a=−b−2a=-b^{-2}a=−b−2
Type a concept, like “slope” or “photosynthesis”.