1. The problem statement, all variables and given/known data Find the SVD of 2. Relevant equations 3. The attempt at a solution I'm stuck My question is why in the solution it originally finds u_2=[1/5,-2/5]' but then says u_2=[1/sqrt(5),-2/sqrt(5)]'. I don't see what math was done in the solution to change the denominator from 5 to square root 5. General Question - When finding the singular value... (sigma_1)^2 = constant, why do we only consider the positive root sigma_1 = sqrt(constant) because the solution to the problem is sigma_1 = +/- sqrt(constant) Thanks for any help you can provide me.