Answer :
Answer:
[tex]9k^{3} -3k^{2}-29k-12[/tex]
Step-by-step explanation:
Step 1: Expand by distributing sum groups.
[tex]3k(3k^{2} -5k-3)+4(3k^{2} -5k-3)[/tex]
Step 2: Expand by distributing terms.
[tex]9k^{3} -15k^{2} -9k+4(3k^{2} -5k-3)[/tex]
Step 3: Expand by distributing terms.
[tex]9k^{3}-15k^{2} -9k+12k^{2} -20k-12[/tex]
Step 4: Collect like terms.
[tex]9k^{3}+(-15k^{2} +12k^{2} )+(-9k-20k)-12[/tex]
Step 5: Simplify.
[tex]9k^{3} -3k^{2}-29k-12[/tex]