SOLUTION: Find the value of alpha such that the quardratic equation(alpha-3)x square+(alpha-3)x+4=0,has equal roots? The given answer is '4'but I don't know to solve it...

Question 389016: Find the value of alpha such that the quardratic equation(alpha-3)x square+(alpha-3)x+4=0,has equal roots?

The given answer is '4'but I don't know to solve it...
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
;
The discriminant has to be equal to 0 for the roots to be equal. Then or . But won't result in a quadratic equation, so .
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