W=2L-3 W*L=193 replace W with 2L-3: (2L-3)L=193 2L^2-3L-193=0 Cannot factor are you sure the numbers are correct? If it cannot be factored, use the quadratic formula to find out L, then you can find out W use the Pythagorean theorem to find the diagonal. I don't see an easier way.
