Factoring Polynomials

Factor the following Polynomial:

 $2x^2+6x+4$  

Factor the following Polynomial:

 $4a^2-12a+8$  

Factor the following Polynomial:

 $10a^2+10a-20$  

Factor the following Polynomial:

 $7a^2-14a-21$  

Factor the following Polynomial (leave your GCF undistributed):

 $x^3-5x^2+4x$  

Factor the following Polynomial (leave your GCF undistributed):

 $x^4-15x^3+56x^2$  

Factor the following Polynomial (Use Square Identity):

 $81x^2-180x+100$  

Factor the following Polynomial (Using Square Identity):

 $49x^2+14x+1$  

Factor the following Polynomial (Use Square Identity):

 $x^2-20x+100$  

On a scale of 1-5, how difficult has factoring been? (5 being the most difficult)

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