On the equation of X, does the square of X, the square of X + 2aX + a = 4 have two unequal real roots? Why?

On the equation of X, does the square of X, the square of X + 2aX + a = 4 have two unequal real roots? Why?

△=4a*a-4(a*a-4)=16>0
There must be two unequal real roots