Which equation has solutions of 6 and -6?
A.x2 – 12x + 36 = 0
B.x2 + 12x – 36 = 0
C.x2 + 36 = 0
D.x2 – 36 = 0
A.x2 – 12x + 36 = 0
B.x2 + 12x – 36 = 0
C.x2 + 36 = 0
D.x2 – 36 = 0