SOLUTION: I answered the equation 9x^2=36 in what i thought was quadratic form but my professor informed me that it was not, i got the answer 2,-2 which was correct.. what are the correct st

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: I answered the equation 9x^2=36 in what i thought was quadratic form but my professor informed me that it was not, i got the answer 2,-2 which was correct.. what are the correct st      Log On


   

Question 682722: I answered the equation 9x^2=36 in what i thought was quadratic form but my professor informed me that it was not, i got the answer 2,-2 which was correct.. what are the correct steps to this problem?
Found 2 solutions by lynnlo, Alan3354:
Answer by lynnlo(4176) About Me  (Show Source):
You can put this solution on YOUR website!
9x^2=36
9x^2-36=0=========THIS IS YOUR QUADRATIC
9x^2-36=0
0=0
solution 2,-2

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
I answered the equation 9x^2=36 in what i thought was quadratic form but my professor informed me that it was not, i got the answer 2,-2 which was correct.. what are the correct steps to this problem?
-------------
9x^2 = 36
x^2 = 4
x = -2, +2
---------
Or
9x^2 - 36 = 0
x^2 - 4 = 0
(x-2)*(x+2) = 0
same answer