Hello,
1)
[tex]4a^2-16ab^3+8ab^2c=4a(a-4b^3+2b^2c)[/tex]
2)
[tex]n^2+8n+15\\
=n^2+5n+3n+15\\
=n(n+5)+3(n+5)\\
=(n+5)(n+3)
[/tex]
3)
[tex]g^2-9g+20\\
=g^2-5g-4g+20\\
=g(g-5)-4(g-5)\\
=(g-5)(g-4)
[/tex]
4)
[tex]z^2-7z-30\\
=z^2-10z+3z-30\\
=z(z-10)+3(z-10)\\
=(z-10)(z+3)
[/tex]
5)
[tex]4y^3-36y\\
=4y(y^2-9)\\
=4y(y-3)(y+3)
[/tex]
