Which of the following expressions is equal to - x2 - 4 ?
O A. (-x-21)(- 2)
O B. (x+2)(x - 21)
O C. (-x + 2)(x - 21)
O D. (-x - 2)(x+21)

Which of the following expressions is equal to x2 4 O A x21 2 O B x2x 21 O C x 2x 21 O D x 2x21 class=