Question 960937

The solution(s) to the equation 49a2 – 28a + 4 = 0 are ?

How do i solve this?
Thank you for yoour help.
<pre>{{{49a^2 - 28a + 4 = 0}}}
{{{49a^2 - 14a - 14a + 4 = 0}}}
7a(7a - 2) - 2(7a - 2) = 0
(7a - 2)(7a - 2)= 0
7a - 2 = 0
7a = 2_____{{{highlight_green(a = 2/7)}}}