If you mean the 5th term is 446, then
Possibly
Or
If you meant the pattern 434, 434, 436, 438 and what term is 446, then:
The pattern your teacher is most likely wanting is
However, the first one above also works but makes 446 the 5th term - there are infinitely many polynomials which give {432, 434, 436, 438} as the first 4 terms and then 446 as some term afterwards, for example:
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There are 157: 103, 113, 123, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 143, 153, 163, 173, 183, 193, 203, 213, 223, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 243, 253, 263, 273, 283, 293, {300-399}, 403, 413, 423, 430, 431, 432, 433, 434, 435, 436, 437, 438, 439, 443, 453, 463, 473, 483, and 493.
559 * 438 = 244,842
734
438 x 35506 = 15551628
438 + 382 ___ 820