SOLUTION: X(X-3)=X-9

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Question 409773: X(X-3)=X-9
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
This problem has nothing to do with linear algebra...

Anyway, we have x%5E2+-+3x+=+x+-+9 --> x%5E2+-+4x+%2B+9+=+0. You can find the roots of x via the quadratic formula.