(x+2)^2 = (2x-3)^2 + (x+3)^2 - 2(2x-3)(x+3)cos(90-q)
P pdang Member Joined Mar 20, 2013 Messages 31 Gender Male HSC 2010 Jul 27, 2013 #21 (x+2)^2 = (2x-3)^2 + (x+3)^2 - 2(2x-3)(x+3)cos(90-q)