Determine Which of the Following Equations Are Written in the Correct

Multiple Choice

Determine which of the following equations are written in the correct form to apply the zero product rule directly. i. $( x - 9 ) ( x + 7 ) = 0$
ii. $x ( x - 9 ) = 7$
iii. $x ( x + 7 ) = 0$
iv. $x ^ { 2 } - 2 x - 63 = 0$

A) i, iii
B) i, ii, iii
C) i
D) i, iii, iv