900 def fna(x,a1,a2,a3) = a1*x^2+a2*x+a3 1000 for a3 = -10 to 10 step 0.5 1100 for a2 = -10 to 10 step 0.5 1200 for a1 = -10 to 10 step 0.5 1300 for x = -10 to 10 step 0.5 1350 let y = fna(x,a1,a2,a3) 2550 if y = 0 then 2560 print "y = ";y;" x = ";x;" a1 = ";a1;" a2 = ";a2;" a3 = ";a3 2570 endif 3000 next x 3199 next a1 3399 next a2 3500 next a3