Answer:
(5a-2)(5a-2) or (5a-2)^2
Step-by-step explanation:
25a^2-20a+4
factor out the trinomial,
(5a-2)(5a-2)
Find two numbers that when they multiply, you get the third term, which is 4 in this case. And when they add up, you get the second term, which is -20 in this case.
