please how to sold this please help me

Answer:
[tex] \sf{Answer:}[/tex]
1.) 12ab - 6a²b² = 6ab(2 - ab)
2.) s⁵d³f⁴ + s⁴d⁴f⁵ - s⁶d³f³ = s⁴d³f³ (sf + df² - s²)