Answers:
2.
a) [tex]5y^{2} z^{2}[/tex]
b) [tex]4x^{2} y[/tex]
a) [tex]3x^{2} +2x+4[/tex]
b) [tex]3x+2[/tex]
c)[tex]x-3[/tex]
3.
a) [tex]2x+3[/tex]
b) [tex]2x^{2} -6x-24[/tex]
4.
a) [tex]4x-20[/tex]
b) [tex]x(3x+2)=3x^{2} +2x[/tex]
I have a feeling I could be wrong for 4 a)
