I believe the correct answer is B. It is the polynomial x^2 – 9x – 18 that is a prime polynomial. Other options can be factored out to a number under the real number system while option B cannot give a whole number. The factors are as follows:
<span>A.) x2 – 7x – 18 9 and -2 B.) x2 – 9x – 18 10.68465844 and -1.684658438 C.)x2 + 3x – 18 3 and -6 D.)x2 + 17x – 18 1 and -18</span>
Yes. If you're given a lower triangle matrix A, then A = LU if L = A and U = I (the identity matrix). If your matrix is upper triangular, then A = LU with L = I and U = A.