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a(a-6) + 9 = 0
a^{2} - 6a + 9 = 0
(a - 3)(a - 3) = 0
a = -3
is this correct
a^{2} - 6a + 9 = 0
(a - 3)(a - 3) = 0
a = -3
is this correct
All except for the last step. If a - 3 = 0, then a = ____a(a-6) + 9 = 0
a^{2} - 6a + 9 = 0
(a - 3)(a - 3) = 0
a = -3
is this correct