By moving all factors to the left.
Now for each factor being equal to zero.
Square becomes square root when crossing the equality sign to make X the subject of formula.
By making X the subject of formula.
When the negative sign crosses the equality sign, it becomes positive.
This reminds me so much about solving problems back in secondary school. I didn't like solving problems at all. I was just an average student when it came to that. I never enjoyed it and I only read to pass. I wouldn't even practice them until it was time for examination.