Question

What was the error?

He did not square 36 correctly since 362≠−6

Or

He did not solve the equation completely since there is a positive answer as well.

Answer 1

When we have a power:


`{g}^(2) = 36`

We should use a root to solve:


`g = √(36)`

When we have a square root, there are two solutions: positive and negative.


`\boxed {g = + 6 \: \textsf { or} \: - 6}`

So, the correct answer is:

"He did not solve the equation completely since there is a positive answer as well."