Inequality, x²-（3+a）x+3a＞0

Factorization
（x-3）（x-a）>0
(x-3) and (x-a) are the same sign
1、 X-3 > 0 x-a > 0
x>3 x>a
When a > = 3
The solution is x > a
When A3
2、 X-3

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