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Is this algebraic expression correct

  • #1
a(a-6) + 9 = 0
a2 - 6a + 9 = 0
(a - 3)(a - 3) = 0
a = -3

is this correct
 

Answers and Replies

  • #2
berkeman
Mentor
57,485
7,508
a(a-6) + 9 = 0
a2 - 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 = ____
 

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