How would I add quadratic terms for Altitude and Speed as a model? And interpret them to a meaningful context?

\fA B C D E F G H I Obs Noise Climb Cruise Descent Speed Alt SpeedSqr AltS qr 250 10 31,2500 100,00 340 15 57,8000 225,00 320 18 51,2000 324,00 330 24 54,4500 576,00 HOOOOOC 346 27 59,8580 729,00 260 39 33,8000 1521,00 280 24 39,2000 576,00 395 10 78,0125 100,00 380 16 72,2000 256,00 400 10 80,0000 100,00 335 28 56,1125 784,00 HOI 380 18 72,2000 324,00 380 16 72,2000 256,00 ) O P P P P P O P P O O O O O O O O O O O O O O P P 390 22 76,0500 484,00 400 20 80,0000 400,00 400 19 80,0000 361,00 405 19,6 82,0125 384,16 O 320 15 51,2000 225,00 310 23 48,0500 529,00 250 8 31,2500 64,00 280 12 39,2000 144,00 320 14 51,2000 196,00 340 17 57,8000 289,00 340 18 57,8000 324,00 380 19,6 72,2000 384,16 385 22 74,1125 484,00 420 20 88,2000 400,00 OOO OOO O H H HOOO OO OP 230 8 26,4500 64,00 OC 340 21 57,8000 441,00 250 10 31,2500 100,00 31 320 11,5 51,2000 132,25 340 12 57,8000 144,00 320 14,5 51,2000 210,25 34 330 19 54,4500 361,00 360 23 64,8000 529,00 370 23 68,4500 529,00 380 22 72,2000 484,00 395 21 78,0125 441,00 365 12 66,6125 144,00 320 10 51,2000 100,00 250 8,5 31,2500 72,25 250 10 31,2500 100,00 320 11 51,2000 121,00 305 22 46,5125 484,00 OH 350 26 61,2500 676,00 380 13 72,2000 169,00 310 23 48,0500 529,00 295 26 43,5125 676,00 280 27 39,2000 729,00 320 28,4 51,2000 806,56 330 29 54,4500 841,00 PH P P P OO OO OO OO OO POO 320 21 51,2000 441,00 340 23,5 57,8000 552,25 350 23,5 61,2500 552,25 270 37 36,4500 1369,00 272 37 36,9920 1369,00 OOOOOOOPPI 310 32 48,0500 1024,00 350 25 61,2500 625,00 370 21 68,4500 441,00 405 19,5 82,0125 380,25 250 4,5 31,2500 20.25