<p>If (a+b)^1/2 = (a-b)^-1/2, which of the following must be true?
A. b=0
B. a+b=1
C. a-b=1
D. a^2+b^2=1
E. a^2-b^2=1</p>
<p>whats the best way to this?</p>
<p>Where did you get this question?</p>
<p>E .</p>
<p>Change al the ^1/2 ^-1/2 to a+b squared,1/a-b squared then cross multiply</p>
<p>thanks! i get it now</p>