Question

Is `7` a solution to the equation `|a^2 - a - 1| = 0`?

Answer 1

`|a^2-a-1|=0`
Put `a=7`

`implies L.H.S=|7^2-7-1|=|49-7-1|=|41|=41!=R.H.S`

The given solution is not verified therefore, this is not a solution for the given equation and thus the answer to this question is `No`.