I have a simple looking formula that I just can't seem to rearrange to get the correct answer.
Make y the subject of x = y2 / 4
According to my revision guide I should deal with the fraction first:
4x = y2
All that is left to do is square root both sides:
y = +- [MATH]\sqrt{4x}[/MATH]
However the answer given is:
y = +- 2[MATH]\sqrt{x}[/MATH]
So am I supposed to be square rooting the 4 and x separately instead as a single term?
Make y the subject of x = y2 / 4
According to my revision guide I should deal with the fraction first:
4x = y2
All that is left to do is square root both sides:
y = +- [MATH]\sqrt{4x}[/MATH]
However the answer given is:
y = +- 2[MATH]\sqrt{x}[/MATH]
So am I supposed to be square rooting the 4 and x separately instead as a single term?