D =1296-4*324 = 0
x = 36/2 = 18
a=1 b=-36 c=324
D=b^2-4ac
D=(-36)×(-36)-(4×1×324)
D=1296-1296=0
x=-b/2a
x=36/2=18
D =1296-4*324 = 0
x = 36/2 = 18
a=1 b=-36 c=324
D=b^2-4ac
D=(-36)×(-36)-(4×1×324)
D=1296-1296=0
x=-b/2a
x=36/2=18