SOLUTION: 4. Three times the square of a certain positive number exceeds six times the number by nine. Find the number:

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Question 118568:
4. Three times the square of a certain positive number exceeds six times the number by nine. Find the number:
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
3(X^2)=6X+9
3X^2-6X-9=0
3(X^2-2X+3)=0
3(X-3)(X+1)=0
X-3=0
X=3 ANSWER.
PROOF
3(3^2)=6*3+9
3*9=18+9
27=27