Help me3.(3x+2) (6x²+2x-5)4.(x²-2x-15):(x+3)bantu dong,Kak!

3. (3x+2) (6x²+2x-5) =18x³+6x²-15x+12x²+4x-10
=18x³+18x²-11x-10

4. (x²-2x-15):(x+3) = x²-2x-15 per x+3
= x²+3x-5x-15 per x+3
= x-5

#Semoga Membantu

3)
→ (3x + 2)(6x² + 2x – 5)

= 3x(6x² + 2x – 5) + 2(6x² + 2x – 5)

= 18x³ + 6x² + 12x² – 15x + 4x – 10

= 18x³ + 18x² – 11x – 10

4)
→ (x² – 2x – 15) : ( x + 3 )

= (x – 5)(x + 3)/(x + 3)

= ( x – 5 )