If the binomial trinomial X & # 178; - ax + 2a-3 of X is a complete square, then the value of a is

If the binomial trinomial X & # 178; - ax + 2a-3 of X is a complete square, then the value of a is

∵ X & # 178; - ax + 2a-3 is a complete square
The equation x & # 178; - ax + 2a-3 = 0 has two equal real roots
∴△=(-a)²-4(2a-3)=0
The solution is a = 2 or 6
I don't know how to ask~