36. Multiply (1 + i) (1 - i) O 2 O 1 O 1-i O 2 +i 37. Simplify. (4) (x + 2) (x - 2) ( x - 2) (x+2) O ( x - 2) (x+ 2) 0 4 O 4 ( X - 2) O 4 ( x + 2 ) 38. Use the Binomial Theorem to expand the following expression. ( x + 1)5 O x5 +5x4 +10x3 +10x2 +5x +1 O x5 + 1 O x5+4x4 +6x3 + 4x2 +x None of these answers are correct. 39. What is the determinant of the following matrix? A determinant does not exist. O -2 0 5 0 - 6 40. Multiply (x - 3)(x + 4). O x 2 + x - 12 O x 2 + 7x - 12 O x2 - 7x + 12 O x2 - x + 12