1)

Couldn’t you work out the answer by completing the square?

Yes you can but the tutorial was based on using the quadratic formula. (Note: The quadratic formula is derived from completing the square)

Was wondering why X is = to t^2 ?? And a massive thank you for all of your fantastic videos!

Since t = x^(1/2) = root(x) Then squaring both sides gives x=t^2

AadamDecember 16, 2016 at 12:13 amCouldn’t you work out the answer by completing the square?

Stuart the ExamSolutions GuyDecember 21, 2016 at 11:19 pmYes you can but the tutorial was based on using the quadratic formula. (Note: The quadratic formula is derived from completing the square)

Jason ShackelDecember 21, 2016 at 12:51 pmWas wondering why X is = to t^2 ??

And a massive thank you for all of your fantastic videos!

Stuart the ExamSolutions GuyDecember 21, 2016 at 11:20 pmSince t = x^(1/2) = root(x)

Then squaring both sides gives x=t^2