Which characteristic equation has roots r1=2r_1 = 2r1=2 and r2=5r_2 = 5r2=5?
r2+7r+10=0r^2 + 7r + 10 = 0r2+7r+10=0
r2−7r+10=0r^2 - 7r + 10 = 0r2−7r+10=0
r2−3r+10=0r^2 - 3r + 10 = 0r2−3r+10=0
r2−10r+7=0r^2 - 10r + 7 = 0r2−10r+7=0