Solve for x

Question

ax^2 - 2ax - 4 =0

Answer 1

just use the quadratic formula:

x = (2a±√(4a^2+16a))/(2a)
= (2a±2√(a^2+4a))/(2a)
= 1±√(a^2+4a)/a
or
= 1±√(1 + 4/a)