text: dunno what mathcad is but...\na*b=2 and a/b=0.5\n\n(ab)*(a/b)=2*0.5\na^2=1\na=1 or a=-1\n\nif a=1, b= 2/1= 2\nif a=-1, b= 2/-1 = -2\n\nbut then again i think i need some explanation on what mathcad is. hehehe sorry to bother