Given that the square roots of a positive number are A-3 and 4a-2, what is the value of a? What is the positive number?

Given that the square roots of a positive number are A-3 and 4a-2, what is the value of a? What is the positive number?

Since they are square roots, they are positive and negative for each other
a-3=-(4a-2)
a-3=2-4a
a=1