B blacktown_ Member Joined Apr 30, 2012 Messages 65 Gender Male HSC 2013 Dec 1, 2012 #1 solve 2^(2x-1)-5.2^x +2=0 the dot is multiplication
K Kurosaki True Fail Kid Joined Jul 14, 2012 Messages 1,167 Location Tubbytronic Superdome Gender Male HSC 2014 Dec 1, 2012 #2 Lol let y=2^x Then u sub this in, U get down to 0.5y^2 - 5y +2 =0 Then: y^2 -10y + 4=0 Solve for y, sub it into y=2^x. Not sure if u need logs or not to get x Then u r done
Lol let y=2^x Then u sub this in, U get down to 0.5y^2 - 5y +2 =0 Then: y^2 -10y + 4=0 Solve for y, sub it into y=2^x. Not sure if u need logs or not to get x Then u r done