21. I believe we can use synthetic division if we have a linear factor as a divisor.....but....it might not always work if we have a divisor polynomial that cannot be factored into separate linear factors
22. The conjugate 2 - √ 3 will also be a root.....this is always true with roots of the form a + √ b
23. If we have a single variable polynomial, the highest power found on that variable is the polynomial degree