- 2x^2+x-15=0 I use the quadratic formula but im not getting -3 and 5/2 as my solution.?

Discover Questions

The quantum number of the last electron of an atom is 4,0,0,+1/2. What is the shortcut electronic configuration of that atom? A train travelling at 18m/s accelerates uniformly at 2m/s² for 6 seconds. Calculate the final speed of the train. im really stuck plz help? Why the back of the military tank is the weakest? And why it has less protection then the front? A mixure of gases N2, H2. Pressure 1.07 bar. Density 0.5122 kg/m3. Assume the gases are ideal. What is the mole fraction of N2? Which of the following aqueous solutions will have the highest boiling point?
.10 m KOH, .10m RbCl, .05 m CaSO4,.05m BaCl2, .10m K2SO4?