Which of the following polynomials can be factored as a perfect square trinomial?

Aline that intersects one of two parallel lines intersects the other also always sometimes never

William invested $5000 in an account that earns 3.8% interest, compounded annually. the formula for compound interest is a(t) = p(1 + i)t. how much did william have in the account after 6 years? (apex)

Cos^2x+cos^2(120°+x)+cos^2(120°-x)i need this asap. pls me