How to factor these perfect square trinomials ?

[Chelsea1996Avocado]

m^2 - 8m + 16

4y - 4y^2 + y^3

3x^2 + 6xy +3y^2

36n^2 - 12n + 1

2a^4 + 4a^2b^2 + 2b^4

 

[wjm11]

m^2 - 8m + 16

4y - 4y^2 + y^3

3x^2 + 6xy +3y^2

36n^2 - 12n + 1

2a^4 + 4a^2b^2 + 2b^4

There are many tutorials on the Net. Here is one: https://www.khanacademy.org/math/al...roducts/v/factoring-perfect-square-trinomials