If y=x2-2x-3, then if y=1, what's x?
actually i was going to go, but then i saw your question so thought to answer it ,
now , \(y=x^2 -2x - 3 \)
now y is also eqal to 1 so
if we quate both of them then,
\(1=x^2 -2x -3 \)
Take 1 to the other side
\(x^2 - 2x- 4 = 0\)
now it has turned into a simple quadratic equation that you can solve either by factirisation or by the quadratic formula!